Greenhouse Emissions and Indoor Cannabis Cultivation

A Look At The Environmental Impact Of The Cannabis Industry   Cannabis and Greenhouse Gas (GHG) Emissions The cannabis industry is booming and with it comes huge financial winnings for those invested in the industry. Looking at this market from a financial, or even “health or self-improvement” standpoint, it is easy to think that society…

An Introduction to Vapor Pressure Deficit

How well do you understand temperature and relative humidity? By Harry Connor Vapor Pressure Deficit (VPD) is used by growers to assess how dry the air is at a given moment. If the air is too dry, photosynthesis will stop in order to protect the plant from exhaustion.  Photosynthesis is the process of converting sunlight,…

Odor Control for a Cannabis Greenhouse

The following is an edited version of our article on cannabis odor control strategies for grow rooms and commercial greenhouses, published in High Times.   Why is greenhouse odor control important? Sweet, skunky, minty, fruity… the aroma of cannabis is an essential feature of the crop, and a key indication of characteristics and quality. Cannabis’…

Carbon Dioxide and Optimal Plant Growth

By Hervé Maumus-Hue Carbon dioxide (CO2): The Basics  Introduction 1 - Different types of plants, different biological processes 2 - C3 plants: the importance of CO2  supplementation 3 - Supplying CO2 - Considerations 4 - Injection techniques 5 - Estimating the cost of CO2 6 - Injecting CO2 can be more cost effective than supplement…

Plant Diet : How To Grow Healthy Plants

By Hervé Maumus-Hue Managing a perfect growing environment is challenging and is the topic of much research. We know that the environment dictates the efficiency of these chemical and physical processes/reactions. As shown below, the environment can be divided into 9 main parameters called the nine cardinal parameters: CO2, temperature, humidity, light, wind, oxygen in…

Water Treatment Solutions for your Cannabis Greenhouse

Major water quality considerations and ways to treat your water for optimal greenhouse production.   When it comes to irrigation, cannabis cultivators get their water from a variety of sources. Whether it’s well, surface, or municipal water, it’s important to have a water treatment system in place to ensure optimal plant growth. If you’re reading…

The Importance of Measuring Vapor Pressure Deficit

What is Vapor Pressure Deficit? Vapor Pressure Deficit (VPD) is a pressure value that combines both temperature and relative humidity(RH). VPD allows growers to understand stress in their plants. It is a measure of the evaporation potential, or the difference in “wetness” (the amount of water vapor), of the air at the leaf versus the…