{"id":205716,"date":"2025-04-04T14:00:00","date_gmt":"2025-04-04T12:00:00","guid":{"rendered":"https:\/\/atami.com\/blog\/uncategorized-en-zaf\/what-is-vpd-perfect-your-cannabis-growing-with-ideal-humidity-and-temperature-settings\/"},"modified":"2025-04-07T09:50:33","modified_gmt":"2025-04-07T07:50:33","slug":"what-is-vpd-perfect-your-cannabis-growing-with-ideal-humidity-and-temperature-settings","status":"publish","type":"post","link":"https:\/\/atami.com\/en-zaf\/blog\/cultivation\/what-is-vpd-perfect-your-cannabis-growing-with-ideal-humidity-and-temperature-settings","title":{"rendered":"What is VPD? Perfect your Cannabis Growing with Ideal Humidity and Temperature Settings"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"205716\" class=\"elementor elementor-205716 elementor-205599\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8d48793 e-flex e-con-boxed e-con e-parent\" data-id=\"8d48793\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c7d7b2f elementor-widget elementor-widget-text-editor\" data-id=\"c7d7b2f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Let\u2019s be real\u2014growing strong, healthy plants isn\u2019t just about watering them and hoping for the best. It takes patience, skill, and a good understanding of the delicate balance between temperature and humidity.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>If you\u2019re into growing, you\u2019ve probably heard the old rule of thumb: keep temperatures around 24\u00b0C with high humidity in the early growth stages, then lower the humidity once flowers or fruits start forming. But what if you could go beyond these general guidelines and fine-tune your environment for even better results?<\/p>\r\n<p>\u00a0<\/p>\r\n<p>That\u2019s where Vapour Pressure Deficit (VPD) comes in.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>Thanks to advancements in plant science, we now have a precise way to calculate the perfect environment for plants at every stage of growth.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>In this article, we\u2019ll break down what VPD is, why it matters, how it affects plant transpiration, and how to calculate it. Plus, we\u2019ll share practical tips and the ideal VPD ranges for different growth phases. Let\u2019s dive in!<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d103a20 elementor-widget elementor-widget-image\" data-id=\"d103a20\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1427\" height=\"803\" src=\"https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-1-1.webp\" class=\"attachment-full size-full wp-image-205695\" alt=\"\" srcset=\"https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-1-1.webp 1427w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-1-1-300x169.webp 300w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-1-1-600x338.webp 600w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-1-1-1024x576.webp 1024w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-1-1-768x432.webp 768w\" sizes=\"(max-width: 1427px) 100vw, 1427px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eb2a91b elementor-widget elementor-widget-heading\" data-id=\"eb2a91b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">INDEX OF CONTENTS<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-32fc965 elementor-widget elementor-widget-text-editor\" data-id=\"32fc965\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/atami.com\/en-zaf\/blog\/cultivation\/how-to-prevent-pests-this-season-organic-farming-tips-for-a-thriving-harvest\/\"><strong>1. What is Vapour Pressure Deficit (VPD)?<\/strong><\/a><br \/><a href=\"#Chapter2\"><strong>2. How do cannabis plants transpire water?<\/strong><\/a><br \/><a href=\"#Chapter3\"><strong>3. How do you calculate the VPD of an indoor grow space?<\/strong><\/a><\/p>\r\n<p style=\"padding-left: 40px;\"><a href=\"#Chapter3a\">a. What you need to get started<\/a><br \/><a href=\"#Chapter3b\">b. Breaking down the formula<\/a><br \/><a href=\"#Chapter3c\">c. Why does this difference matter?<\/a><br \/><a href=\"#Chapter3d\">d. How to calculate it step by step<\/a><br \/><a href=\"#Chapter3e\">e. An example of a VPD chart for growing indoors<\/a><\/p>\r\n<p><a href=\"#Chapter4\"><strong>4. What is a good VPD for cannabis plants?<\/strong><\/a><\/p>\r\n<p style=\"padding-left: 40px;\"><a href=\"#Chapter4a\">a. Early Vegetative (Seedling) Stage (18\/6)<\/a><br \/><a href=\"#Chapter4b\">b. Late Vegetative Stage (18\/6)<\/a><br \/><a href=\"#Chapter4c\">c. Flowering Stage (12\/12)<\/a><\/p>\r\n<p><a href=\"#Chapter5\"><strong>5. Why is VPD so important?<\/strong><\/a><br \/><a href=\"#Chapter6\"><strong>6. Atami\u2019s Conclusion<\/strong><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-42b1bca elementor-widget elementor-widget-heading\" data-id=\"42b1bca\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter1\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is Vapour Pressure Deficit (VPD)?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e10c855 elementor-widget elementor-widget-text-editor\" data-id=\"e10c855\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Vapour Pressure Deficit<\/strong>, usually abbreviated as <strong>VPD<\/strong>, is the difference between <strong>how much moisture the air can hold at a given temperature and how much moisture it actually contains<\/strong>. For cannabis plants, VPD represents the pressure that drives water from the leaves into the air as vapor.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>Temperature and humidity play a key role here\u2014they determine how much water your plants lose through their leaves and, in turn, affect their growth, health, and overall yield. Maintaining an optimal VPD helps your plants transpire efficiently, absorb nutrients effectively, and avoid unnecessary stress.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6421f8e elementor-widget elementor-widget-heading\" data-id=\"6421f8e\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter2\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How do cannabis plants transpire water?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3688131 elementor-widget elementor-widget-text-editor\" data-id=\"3688131\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Think of transpiration as your plants\u2019 way of \u201csweating.\u201d Much like humans, plants are made mostly of water, and when it gets too hot or dry, they lose water to cool themselves down. In plants, this process happens through <strong>stomata<\/strong>\u2014tiny pores on the underside of leaves that open and close based on environmental conditions.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>Here\u2019s the basic rundown of what happens:<\/p>\r\n<p>\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">1. Water is absorbed by the roots and travels up the plant through the <strong>xylem<\/strong>.<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">2. As water evaporates from the <strong>mesophyll cells<\/strong> in the leaves, it exits through the stomata as vapor.<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">3. This loss of water creates a \u201cpull\u201d effect, <strong>drawing more water (and the nutrients dissolved in it) up from the roots.<\/strong><\/p>\r\n<p>\u00a0<\/p>\r\n<p><strong>Transpiration isn\u2019t just about moving water\u2014it\u2019s essential for nutrient transport, maintaining cell pressure, and overall plant health. Without it, plants can\u2019t photosynthesize or grow effectively.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7affe10 elementor-widget elementor-widget-heading\" data-id=\"7affe10\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter3\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How do you calculate the VPD of an indoor grow space?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f750693 elementor-widget elementor-widget-text-editor\" data-id=\"f750693\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>At first glance, calculating VPD might seem like an intimidating task, especially if you&#8217;re just starting to level up your growing techniques. But don\u2019t worry\u2014it&#8217;s simpler than it sounds and mastering it will make a world of difference in your results. Here\u2019s a step-by-step guide to help you understand and calculate VPD with ease.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-59b40e7 elementor-widget elementor-widget-heading\" data-id=\"59b40e7\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter3a\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What you need to get started<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6c4aa2c elementor-widget elementor-widget-text-editor\" data-id=\"6c4aa2c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"padding-left: 40px;\"><strong>1. Digital hygrometer<\/strong><br \/>This device will measure the air temperature and relative humidity of your grow space. It\u2019s an essential tool for any indoor grower, so make sure to have one on hand.<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>2. Infrared thermometer<\/strong><br \/>This is used to measure the temperature of your plants\u2019 leaves. You\u2019ll notice that the leaf temperature is often slightly lower than the surrounding air temperature. That\u2019s because leaves lose heat through transpiration (the process of releasing water vapor).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c684684 elementor-widget elementor-widget-image\" data-id=\"c684684\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1137\" height=\"758\" src=\"https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-2.webp\" class=\"attachment-full size-full wp-image-205710\" alt=\"\" srcset=\"https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-2.webp 1137w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-2-300x200.webp 300w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-2-600x400.webp 600w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-2-1024x683.webp 1024w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings-2-768x512.webp 768w\" sizes=\"(max-width: 1137px) 100vw, 1137px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a5c49ab elementor-widget elementor-widget-heading\" data-id=\"a5c49ab\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter3b\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Breaking down the formula<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-92b8df5 elementor-widget elementor-widget-text-editor\" data-id=\"92b8df5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The formula for VPD is:<\/p>\r\n<p>\u00a0<\/p>\r\n<p><strong>VPD = VP(leaf) &#8211; VP(air)<\/strong><\/p>\r\n<p>\u00a0<\/p>\r\n<p>Let\u2019s unpack this:<\/p>\r\n<p>\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 VP(leaf)<\/strong> refers to the vapor pressure at the leaf surface, which is influenced by the leaf\u2019s temperature. The warmer the leaf, the more water vapor it will release.<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 VP(air)<\/strong> refers to the vapor pressure in the surrounding air, determined by the temperature and humidity of the grow space. High humidity means the air can hold less additional moisture, while low humidity means the air can absorb more moisture from the plant.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-662bfb0 elementor-widget elementor-widget-heading\" data-id=\"662bfb0\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter3c\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Why does this difference matter?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-188f129 elementor-widget elementor-widget-text-editor\" data-id=\"188f129\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Plants thrive when there\u2019s just the right balance between how much water they release (transpire) and how much water the air around them can hold.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>If the <strong>VPD is too low (high humidity)<\/strong>, your plants may struggle to transpire properly, leading to <strong>slower nutrient uptake and increased risks of mold<\/strong>. If the <strong>VPD is too high (low humidity), your plants may lose water too quickly<\/strong>, causing stress and hindering their growth.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6bb1775 elementor-widget elementor-widget-heading\" data-id=\"6bb1775\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter3d\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">How to calculate it step by step<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5aa7112 elementor-widget elementor-widget-text-editor\" data-id=\"5aa7112\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"padding-left: 40px;\">1.<strong> Measure the air temperature and relative humidity<\/strong> using your hygrometer. Write these values down.<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">2.<strong> Measure the leaf surface temperature<\/strong> using your infrared thermometer. This value is usually 1-2\u00b0C lower than the air temperature in a healthy environment.<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">3. Use a VPD chart or online calculator to plug in your values. These tools will save you from doing the math manually.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>If you\u2019re curious to calculate it yourself, here\u2019s the basic process:<\/p>\r\n<p>\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">1. Convert your temperature readings into vapor pressure values. This involves looking up the <strong>saturation vapor pressure (SVP)<\/strong> at your measured temperatures (you can find SVP charts online).<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">2. Multiply the SVP of the air temperature by the relative humidity (in decimal form, e.g., 60% = 0.6) to get the <strong>actual vapor pressure (VP)<\/strong> of the air.<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">3. <strong>Subtract the VP(air) from the VP(leaf)<\/strong> to get the VPD.<\/p>\r\n<p>\u00a0<\/p>\r\n<p><strong>Making it easier<\/strong><br \/>There are <strong>many free VPD charts you can consult<\/strong>, or even <strong>online tools<\/strong> where you just have to enter the temperature and humidity data, and they will <strong>calculate the VPD for you in seconds!<\/strong> Many even suggest ranges for the vegetative and flowering stages, so you know exactly what to aim for.<\/p>\r\n<p>\u00a0<\/p>\r\n<p><strong>Pro tip<\/strong><br \/><strong>For beginners:<\/strong> Start with a VPD table. It&#8217;s visual, easy and will tell you the ideal temperature and humidity ranges for the different stages of growth. Keep it handy so you can quickly check if you&#8217;re in the \u201cright zone\u201d.<\/p>\r\n<p>\u00a0<\/p>\r\n<p><strong>For experienced growers:<\/strong> Consider investing in an environmental controller that monitors and adjusts temperature and humidity automatically. This takes the guesswork out of VPD management and ensures your plants are always in their optimal growth environment.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bb36ced elementor-widget elementor-widget-heading\" data-id=\"bb36ced\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter3e\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">An example of a VPD chart for growing indoors<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f64c53a elementor-widget elementor-widget-image\" data-id=\"f64c53a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1000\" height=\"504\" src=\"https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Indoor-Cultivation-with-Ideal-Humidity-and-Temperature-Settings-3.webp\" class=\"attachment-full size-full wp-image-205631\" alt=\"\" srcset=\"https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Indoor-Cultivation-with-Ideal-Humidity-and-Temperature-Settings-3.webp 1000w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Indoor-Cultivation-with-Ideal-Humidity-and-Temperature-Settings-3-300x151.webp 300w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Indoor-Cultivation-with-Ideal-Humidity-and-Temperature-Settings-3-600x302.webp 600w, https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Indoor-Cultivation-with-Ideal-Humidity-and-Temperature-Settings-3-768x387.webp 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5c2fbc8 elementor-widget elementor-widget-heading\" data-id=\"5c2fbc8\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter4\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is a good VPD for cannabis plants?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f5e5d7f elementor-widget elementor-widget-text-editor\" data-id=\"f5e5d7f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>As your cannabis plants move through their life cycle, they go through distinct growth stages\u2014seedling, vegetative, early flower, and late flowering. Each stage comes with its own specific needs for temperature, humidity, and ultimately, the vapor pressure deficit (VPD).<\/p>\r\n<p>\u00a0<\/p>\r\n<p>Getting the VPD right at every stage is key to optimizing plant growth, health, and yield. Below, we\u2019ve outlined recommended VPD ranges for each growth stage, along with temperature and humidity settings to help you create the ideal environment for your plants.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec6eb0d elementor-widget elementor-widget-heading\" data-id=\"ec6eb0d\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter4a\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Early Vegetative (Seedling) Stage (18\/6)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-15288d8 elementor-widget elementor-widget-text-editor\" data-id=\"15288d8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>At this stage, your seedlings are delicate, focusing their energy on root development and early leaf formation. Keeping the humidity high ensures they don\u2019t lose too much water through transpiration while their root systems are still developing.<\/p>\r\n<p>\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Recommended VPD:<\/strong> 0.4\u20130.8 kilopascals (kPa)<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Air Relative Humidity:<\/strong> 70%<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Air Temperature:<\/strong> 24\u00b0C (75\u00b0F)<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Leaf Temperature:<\/strong> 22\u00b0C (72\u00b0F)<\/p>\r\n<p>\u00a0<\/p>\r\n<p><strong>Tip for beginners:<\/strong> Maintaining a high humidity environment can be tricky without a humidifier, especially in colder or drier climates. If you don\u2019t have one, placing trays of water or wet towels near your plants can help boost humidity levels naturally.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-27b1dea elementor-widget elementor-widget-heading\" data-id=\"27b1dea\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter4b\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Late Vegetative Stage (18\/6)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da5e481 elementor-widget elementor-widget-text-editor\" data-id=\"da5e481\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>In this phase, your plants are growing rapidly, developing a strong canopy, and preparing for flowering. While they still require relatively high humidity, you\u2019ll want to start reducing it slightly to promote robust transpiration and nutrient uptake.<\/p>\r\n<p>\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Recommended VPD:<\/strong> 1.0\u20131.1 kilopascals (kPa)<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Air Relative Humidity:<\/strong> 65%<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Air Temperature:<\/strong> 24\u00b0C (75\u00b0F)<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Leaf Temperature:<\/strong> 24\u00b0C (75\u00b0F)<\/p>\r\n<p>\u00a0<\/p>\r\n<p><strong>For advanced growers:<\/strong> Use this stage to experiment with different VPD levels and observe how your plants respond. Fine-tuning the environment here can have a significant impact on overall growth and plant structure.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec05f5b elementor-widget elementor-widget-heading\" data-id=\"ec05f5b\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter4c\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Flowering Stage (12\/12)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d6644f4 elementor-widget elementor-widget-text-editor\" data-id=\"d6644f4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>This is the most crucial stage of the plant\u2019s life cycle. Buds are forming, terpenes and resin production are ramping up, and your plants are putting everything into creating high-quality flowers. Lower humidity is key here to reduce the risk of mold and other moisture-related problems while maintaining optimal transpiration rates.<\/p>\r\n<p>\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Recommended VPD:<\/strong> 1.2\u20131.6 kilopascals (kPa)<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Air Relative Humidity:<\/strong> 53%<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Air Temperature:<\/strong> 24\u00b0C (75\u00b0F)<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\"><strong>\u2022 Leaf Temperature:<\/strong> 24\u00b0C (75\u00b0F)<\/p>\r\n<p>\u00a0<\/p>\r\n<p><strong>Pro tip for flowering:<\/strong> Make sure to monitor your humidity closely. Even a slight increase can create conditions for bud rot, especially in dense flowers. Investing in a dehumidifier may be worth it for this critical phase.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ddeda3d elementor-widget elementor-widget-heading\" data-id=\"ddeda3d\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter5\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why is VPD so important?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ddd2948 elementor-widget elementor-widget-text-editor\" data-id=\"ddd2948\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>If you\u2019re new to growing, VPD charts might seem overly technical at first. However, they\u2019re an invaluable tool that allows you to balance humidity and temperature with precision, ensuring your plants thrive at every stage of growth.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>By consistently maintaining the ideal VPD levels, you\u2019re not just growing plants\u2014you\u2019re creating an optimized environment that promotes:<\/p>\r\n<p>\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">\u2705 Better nutrient absorption.<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">\u2705 Improved plant health and resilience.<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">\u2705 Higher terpene and resin production.<\/p>\r\n<p style=\"padding-left: 40px;\">\u00a0<\/p>\r\n<p style=\"padding-left: 40px;\">\u2705 Bigger and denser flowers.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>Large-scale commercial facilities rely heavily on VPD charts to maintain consistent quality across all plants. The same principles apply to hobby growers. With just a <strong>hygrometer<\/strong>, an <strong>infrared thermometer<\/strong>, and access to a VPD chart or calculator, you can start fine-tuning your grow room like a pro.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0d6f544 elementor-widget elementor-widget-heading\" data-id=\"0d6f544\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"Chapter6\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Atami\u2019s Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a3d125 elementor-widget elementor-widget-text-editor\" data-id=\"4a3d125\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Perfecting your VPD is a big step, but it\u2019s one effective way to improve the quality and yield of your crops. Whether you\u2019re cultivating few cannabis plants, fruits, or vegetables, understanding and controlling VPD ensures you leave no stone unturned in achieving top-tier quality.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>Don&#8217;t worry &#8211; this isn&#8217;t as difficult as it seems, just use VPD charts as a guide, and focus on consistent monitoring rather than perfection! Every grower starts somewhere, and small adjustments can lead to big improvements. But remember, the more precise you get, the closer you\u2019ll come to creating that perfect growing environment.<\/p>\r\n<p>\u00a0<\/p>\r\n<p>So, grab your tools, check your readings, and dive into the science of VPD. Your plants\u2014and your future harvests\u2014will thank you!<\/p>\r\n<p>\u00a0<\/p>\r\n<p>DISCLAIMER:<br \/>This content is intended for educational and entertainment purposes only. We do not endorse or promote illegal activities related to cannabis. Please adhere to the laws and regulations of your jurisdiction regarding cannabis use.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Let\u2019s be real\u2014growing strong, healthy plants isn\u2019t just about watering them and hoping for the best. It takes patience, skill, and a good understanding of the delicate balance between temperature and humidity. \u00a0 If you\u2019re into growing, you\u2019ve probably heard the old rule of thumb: keep temperatures around 24\u00b0C with high humidity in the early [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":205659,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"iawp_total_views":19,"footnotes":""},"categories":[325,327],"tags":[2864,2861,2863,2862,2865,2860],"class_list":{"0":"post-205716","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-cultivation","9":"tag-calculate-vpd-cannabis-plants-en-zaf","10":"tag-humidity-for-cannabis-en-zaf","11":"tag-temperature-for-cannabis-plant-en-zaf","12":"tag-vpd-cannabis-growth-en-zaf","13":"tag-vpd-chart-cannabis-en-zaf","14":"tag-vpd-chart-plants-en-zaf"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What Is VPD? Optimize Cannabis Growth with Ideal Humidity and Temperature<\/title>\n<meta name=\"description\" content=\"Discover how VPD (Vapor Pressure Deficit) can boost your cannabis yields. Learn to fine-tune humidity and temperature for optimal plant health and growth indoors.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atami.com\/en-zaf\/blog\/cultivation\/what-is-vpd-perfect-your-cannabis-growing-with-ideal-humidity-and-temperature-settings\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is VPD? Perfect your Cannabis Growing with Ideal Humidity and Temperature Settings\" \/>\n<meta property=\"og:description\" content=\"Discover how VPD (Vapor Pressure Deficit) can boost your cannabis yields. Learn to fine-tune humidity and temperature for optimal plant health and growth indoors.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/atami.com\/en-zaf\/blog\/cultivation\/what-is-vpd-perfect-your-cannabis-growing-with-ideal-humidity-and-temperature-settings\" \/>\n<meta property=\"og:site_name\" content=\"Atami\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Atami.International\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-04T12:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-04-07T07:50:33+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/atami.com\/wp-content\/uploads\/2025\/04\/What-is-VPD-Perfect-your-Cannabis-Growing-with-Ideal-Humidity-and-Temperature-Settings.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"1462\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Stoney Tark\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@AtamiEU\" \/>\n<meta name=\"twitter:site\" content=\"@AtamiEU\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Stoney Tark\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":[\"Article\",\"BlogPosting\"],\"@id\":\"https:\\\/\\\/atami.com\\\/en-zaf\\\/blog\\\/cultivation\\\/what-is-vpd-perfect-your-cannabis-growing-with-ideal-humidity-and-temperature-settings#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/atami.com\\\/en-zaf\\\/blog\\\/cultivation\\\/what-is-vpd-perfect-your-cannabis-growing-with-ideal-humidity-and-temperature-settings\"},\"author\":{\"name\":\"Stoney Tark\",\"@id\":\"https:\\\/\\\/atami.com\\\/en-zaf#\\\/schema\\\/person\\\/7e9622f2202c02d94220047cc82a5d08\"},\"headline\":\"What is VPD? 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