Hydroponic Solution flow

by Robert Cisco
(Mandeville, La)

How long should the plant roots remain in the solution?

How long should the plant roots remain dry?




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Hydroponic Solution flow

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Aug 09, 2012
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Pump timer
by: Larry

I use a pump timer I purchased at the local hardware store that is manually set by pulling out little 'pins' in a 24 hour wheel.

The minimum time I can set is either ten or 15 minutes. If your minimum time to set on the timer is 30 minutes then go for it.

Just do not flood again until the substrate begins to dry.

Aug 09, 2012
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time to submerge roots
by: Adrian Hayter

I use a timer that is on for 15minutes. So I guess the answer is flood for no more than 15 minutes. There are timers where the minimum time is 30 minutes but I believe that is too long for the roots to stay submerged.

Aug 08, 2012
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Ebb/Flow Design
by: Larry

In an ebb/flow design plant roots are periodically flooded then drained leaving behind damp substrate.

This is done to dry out growing medium to an extent that discourages fungus and disease and allows plants to become oxygenated easier - bubbling solution as well as draining solution draw in oxygen.

As for the timing of when to flood and drain that is dependent on a variety of factors like relative humidity, temperature, amount of sunlight, etc.

There is no hard and fast rule determining how long to flood and drain. Start with 10 minutes flooding an hour and check if the the medium stays damp.

If it dries out increase flood duration. If a plant wilts and medium is saturated then decrease the flood cycle.

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