Stephen Keen

Stephen Keen is a 14-year veteran of the cannabis industry and life-long tinkerer. He saw a need for cannabis-tailored climate control solutions, which led to his co-founding of Hydro Innovations—now Surna Inc—in 2007. Surna’s mission is to design efficient, reliable, and intelligent equipment for climate control for cannabis cultivation. Keen has vast knowledge of controlled environment agriculture, including serving as the chief cultivation expert for one of Colorado’s largest MMJ operations and being published in various industry magazines. He has served as president and CEO, and now as director of technology, of Surna Inc.

Articles by Stephen Keen


The Weakest Links: Why Cannabis Growers Should Be Culling Their Weaker Plants The Weakest Links: Why Cannabis Growers Should Be Culling Their Weaker Plants The Weakest Links: Why Cannabis Growers Should Be Culling Their Weaker Plants The Weakest Links: Why Cannabis Growers Should Be Culling Their Weaker Plants


Focus on the best and forget the rest. To build a strong crop of healthy plants, don’t be afraid to cull the weakest plants at each stage.

Try This Highly Recommended Cannabis Lighting Schedule Try This Highly Recommended Cannabis Lighting Schedule Try This Highly Recommended Cannabis Lighting Schedule Try This Highly Recommended Cannabis Lighting Schedule


The key factor in growing cannabis is not the light periods; it’s the dark periods. Surna’s Stephen Keen weighs in with his preferred light...

How to Reduce Your Grow Room's Operational Costs How to Reduce Your Grow Room's Operational Costs How to Reduce Your Grow Room's Operational Costs How to Reduce Your Grow Room's Operational Costs


Save time and money while growing marijuana with these growroom efficiency tips from expert growers.

6 Myths About Cooling Your Cannabis Grow Room 6 Myths About Cooling Your Cannabis Grow Room 6 Myths About Cooling Your Cannabis Grow Room 6 Myths About Cooling Your Cannabis Grow Room


There are a lot of myths that surround the cooling needs in the cannabis industry. Surna/Hydro Innovation’s Stephen Keen delves into some...

How Your Cannabis Plants Respond to Stress, the Good and the Bad How Your Cannabis Plants Respond to Stress, the Good and the Bad How Your Cannabis Plants Respond to Stress, the Good and the Bad How Your Cannabis Plants Respond to Stress, the Good and the Bad


The phrase ‘What doesn’t kill you makes you stronger’ can also apply to your plants. By providing ‘good’ stress to your crop, you can...

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