Water usage per 4 x 4 per day. How much?

I'm trying to research a little bit how much water your plants consume per day per 4 x 4.
I'm doing some calculations for reservoirs and for a dehumidifier.
So I am very curious about the experiences of growers here of how much water is consumed when the plants are at their peak of evaporation.

Depending on #/ size, I'd plan 2 gallons per plant at least to be on the safe side.
Hempy buckets (drain to waste)
@ peak = 1.5-2.0 gallons per day on average for these...

Evaporative losses can make a big difference. So the type of setup used will dictate, to a larger degree, how much water you will pump into the air.

When I ran flood and drain I noticed that each light (4x4) drank about 5 gallons a day. Thats what I had to add back to the reservoir to maintain. Of course the flood and drain system has high evaporative losses. That was the last time I ran for any period without a float top off. I can say that a lot of evaporative losses had the be happening because with my top feed soiless trees I am only giving say 2 gallons a day for a 4x4. lol

.Smoke said:

Depending on #/ size, I'd plan 2 gallons per plant at least to be on the safe side.
Hempy buckets (drain to waste)
@ peak = 1.5-2.0 gallons per day on average for these...

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Seems there are 3 of those on 4 x 4?
So about 4.5 to 6 gallons a day at peak?

Renfro said:

When I ran flood and drain I noticed that each light (4x4) drank about 5 gallons a day. Thats what I had to add back to the reservoir to maintain. Of course the flood and drain system has high evaporative losses.

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I assume this is not only evaporation that took place through the leaves, but also evaporation of the water in the open tray?

Renfro said:

I can say that a lot of evaporative losses had the be happening because with my top feed soiless trees I am only giving say 2 gallons a day for a 4x4.

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That is not a lot on 4 x 4!

Keesje said:

also evaporation of the water in the open tray?

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Yes that is what I was referring to. The evaporative losses through the plants leaves I call transpiration.

ive had 6 plants drink 50 gallons in a week.

fragileassassin said:

ive had 6 plants drink 50 gallons in a week.

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In a 4x4 area? What type setup? Like actually transpire that much or is there a significant loss to evaporation?

nah a bit bigger just saying for reference. I run rdwc. 6x 17 gallon totes. probably a 4x8 canopy usually.
mostly plants drinking. I run 80-82F under LEDs and usually around 70% humidity until toward the end. Usually run a heater and evaporative humidifier to keep them both up.
Flower system sits around 60 gallons and has nearly unnoticeable evaporative loss over a week while the humidifier is going.
Through the first half of flower they pretty regularly drink down my 55 gallon auto top off barrel.

fragileassassin said:

nah a bit bigger just saying for reference. I run rdwc. 6x 17 gallon totes. probably a 4x8 canopy usually.
mostly plants drinking. I run 80-82F under LEDs and usually around 70% humidity until toward the end. Usually run a heater and evaporative humidifier to keep them both up.
Flower system sits around 60 gallons and has nearly unnoticeable evaporative loss over a week while the humidifier is going.
Through the first half of flower they pretty regularly drink down my 55 gallon auto top off barrel.

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So what do you think they will drink at the peak on a 4 x 4 per day?

Id say your previous estimate of somewhere around 5 would probably be a logical starting point.

4 plants in a 4 x 4 DTW I average about 16 gallons a week so about 2 and a bit a day

i think i use around 30 galls a week or something around,canopy is filling a 5x5 area so its going up just about everyday in water consumption

I have seen 1m2, fully scrogged, Flood'n'drain, drink 40L in a week. But I am still learning and my results are often lower, maybe 20L a week for 1m2 (3" x 3").

petedavid said:

I have seen 1m2, fully scrogged, Flood'n'drain, drink 40L in a week.

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If you would compare this to a 4 x 4 then it would be 40 liter x 1.44 = almost 58 liter.
58 liter divided by 7 days = around 8.3 liters per day. 2.2 gallons per day.

5 plants in soil/coco in a 4 x 4 and I get through around 20ltrs every 3rd day

5 weeks in flower by the way

KK26 said:

5 plants in soil/coco in a 4 x 4 and I get through around 20ltrs every 3rd day

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So that is about 7 liters (or little less then 2 gallons) per day.
Curious what they will do at their peak.
Thanks!

Keesje said:

So that is about 7 liters (or little less then 2 gallons) per day.
Curious what they will do at their peak.
Thanks!

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They could be heading to 5ltrs every 3 days as I'm getting very little to no run off with 4ltrs

.Smoke said:

Depending on #/ size, I'd plan 2 gallons per plant at least to be on the safe side.
Hempy buckets (drain to waste)
@ peak = 1.5-2.0 gallons per day on average for these...
View attachment 4646817
View attachment 4646819

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Freaking beautiful.. What strain is that on bottom?

Throttlebuzz said:

Freaking beautiful.. What strain is that on bottom?

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Thank you.
She was a....

DaFreak said:

4 plants in a 4 x 4 DTW I average about 16 gallons a week so about 2 and a bit a day

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Auto watering system?