Understanding the role of humidity in the growth and preservation of cannabis is crucial for growers and consumers alike.

This article will explore the importance of humidity, its effects on cannabis, and methods to maintain the optimal humidity levels throughout the various stages of cannabis growth and storage [1].

Importance of Humidity

Humidity plays a significant role in the growth and health of cannabis plants, as it directly affects photosynthesis, respiration, and water absorption [5].

It is essential to maintain proper humidity levels to ensure healthy growth, prevent mold, and preserve the plant's aromatic and therapeutic properties.


Marijuana Hygrometer for stash box

Optimal Humidity Levels

Humidity in the Vegetative Stage

During the vegetative stage, cannabis plants prefer higher humidity levels, typically around 70%. This allows for optimal growth and development [5].

Humidity in the Flowering Stage

In the flowering stage, cannabis plants require lower humidity levels, between 40-50%, to prevent mold and rot [4]. It is also essential to drop temperatures by 5-8°C during the lights-off period to further prevent issues [4].

Waterbeads for Stash box Humidity

Humidity Control Packs

  • Boveda: Boveda offers two-way humidity control products that maintain an ideal 62% humidity level inside airtight containers, allowing for proper curing and storage [2, 6]. A costly and least favorite of our picks.

  • Integra by Desiccare: Integra provides a complete line of humidity control products for various stages of the cannabis industry, including drying, curing, storing, and preserving edibles [3].

  • And our personal favorite that is most cost effective, environmentally friendly. Water beads/ hydrobeads used by Lokkboxx. 

Effects of High Humidity

  • Mold and Rot: High humidity can lead to mold and rot on cannabis buds, especially during the flowering stage [7].

  • Slow Growth: Excessive humidity can also slow down the growth of cannabis plants, as it can create an environment that encourages fungal and bacterial growth [5].

Effects of Low Humidity

Increased Water Evaporation: Low humidity levels cause cannabis plants to evaporate more water through their leaves, potentially leading to dehydration and stress [7].

Decreased Terpene Production: Low humidity can negatively impact the production of terpenes, the aromatic compounds found in cannabis that contribute to its unique scent and flavor [5].

Heat and humidity

Temperature and Humidity

Ideal Temperature Ranges: Cannabis plants thrive in temperatures between 20-26°C during the lights-on period and slightly cooler temperatures during the lights-off period [4].

Temperature's Effect on Humidity: Temperature changes can affect humidity levels, making it essential to monitor and adjust both temperature and humidity for optimal cannabis growth [6].


Managing Humidity

Proper Ventilation: Ensuring adequate airflow and ventilation is crucial for maintaining optimal humidity levels and preventing mold growth [5].

Dehumidifiers: Using a dehumidifier can help remove excess moisture from the air and maintain proper humidity levels during the flowering stage [5].

Humidifiers: In low humidity environments, a humidifier can help increase humidity levels to create a more favorable environment for cannabis growth [5].


Understanding and managing humidity is crucial for the successful growth, health, and preservation of cannabis plants.

By maintaining optimal humidity levels throughout the various growth stages and using humidity control packs during storage, you can ensure the best possible outcome for your cannabis plants.


  1. What is the ideal humidity level for cannabis during the vegetative stage?
    • Around 70%.
  2. What is the ideal humidity level for cannabis during the flowering stage?
    • Between 40-50%.
  3. How do humidity control packs work?
    • They maintain an ideal humidity level inside airtight containers by absorbing or releasing moisture.
  4. What are the risks associated with high humidity in cannabis growth?
    • Mold, rot, and slow growth.
  5. How can I manage humidity in my grow room?
    • Use proper ventilation, dehumidifiers, and humidifiers to maintain optimal humidity levels.
"Unlock the secret to organized and stylish cannabis storage with our premium stash boxes - visit our website now to discover your perfect match!"

More Articles here:

Choosing the Best Stash Box

Preserving your Cannabis - Humidity, Temperature, Storage

Assembling and Organizing your Stashbox

Choosing the right Method for Cannabis Consumption.

The Ultimate Guide to Different Types of Bongs.

The Ultimate Guide to Cannabis Strains. Which Strain is right for you?

The Best Humidor Stash Box.

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DISCLAIMER: The information provided in this article is for informational purposes only and should not be construed as medical, financial, or legal advice. The use of cannabis and its derivatives may have risks and potential side effects, and individuals should always consult with a qualified healthcare professional before using cannabis or any other substances for medicinal purposes. This article does not endorse the use of cannabis or any other substances for recreational purposes. The author and publisher of this article are not responsible for any damages or losses that may result from the use of the information presented herein. Readers are advised to do their own research and exercise caution when making decisions related to cannabis or any other substances.

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