Stephen Keen

Stephen Keen has been an indoor gardening hobbyist for more than 10 years. His personal successes with his garden led him to want to bring new ideas, mainly water-cooling, to the mainstream, which led to the founding of Hydro Innovations.

Articles by Stephen Keen


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Growers know that vapor pressure deficit is important for healthy plants but requires strict attention to detail and equipment that can...

Bringing in a Bumper Crop: CO2 in the Garden Bringing in a Bumper Crop: CO2 in the Garden Bringing in a Bumper Crop: CO2 in the Garden Bringing in a Bumper Crop: CO2 in the Garden


One important, and often overlooked, aspect of an indoor garden's climate is the level of carbon dioxide present. Here is why this is so...

Total Control: Choosing the Right Cooling System Total Control: Choosing the Right Cooling System Total Control: Choosing the Right Cooling System Total Control: Choosing the Right Cooling System


There are all kinds of options available to you when choosing the ideal cooling system for your garden—the tricky part is balancing upfront...

Creative Control: Out-of-the-Box Cooling Solutions for Your Summer Garden Creative Control: Out-of-the-Box Cooling Solutions for Your Summer Garden Creative Control: Out-of-the-Box Cooling Solutions for Your Summer Garden Creative Control: Out-of-the-Box Cooling Solutions for Your Summer Garden


There isn’t always just one solution to every problem. Given a little ingenuity, even the big ones—like dealing with excessive summer...

In Control: A Guide to Achieving the Perfect Indoor Climate In Control: A Guide to Achieving the Perfect Indoor Climate In Control: A Guide to Achieving the Perfect Indoor Climate In Control: A Guide to Achieving the Perfect Indoor Climate


Does it seem like you’ll never achieve your ideal harvest? If you consider all the climatic factors, it might finally be within your reach.

Q&A by Stephen Keen


My mother plant grow chamber has an oscillating fan. It is a little cold; is there anything else I need? My mother plant grow chamber has an oscillating fan. It is a little cold; is there anything else I need? My mother plant grow chamber has an oscillating fan. It is a little cold; is there anything else I need? My mother plant grow chamber has an oscillating fan. It is a little cold; is there anything else I need?


If you’re using a small intake fan for cooling your mother chamber and it’s a little cold in there, try putting your intake and exhaust...

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