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Transpiration rates

If a strain like Northern Lights is in full flower in a hydroponic grow, is 30" high and occupies 1 square foot in a SOG configuration, the air temp is 80 F and the RH is 60%, how much water would it transpire per day if grown in a greenhouse? Lot’s of info there haha. I am looking for a ballpark number. I have heard everything between 200 and 2000 mL per day. Does anyone have data on this? Thanks!

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How much are you feeding the plant and how often?

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Also, what lights are you running?

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My guess would be between 0.5 and 1.0 gallons per plant per day

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Hi Tim. Feeding about 2 L per day of nutrients. Thanks!

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Hi Hunter. Using 1000W HPS as supplemental light. Maybe 1 light for 20 sq. ft. Thank you for your response.

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Plants transpire 95% or so of the water that you put into them. Each plant is probably putting out around 1900 ml a day.

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Thank you Tim!

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