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outdoor flood and drain

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hey all,
after some advice on an outdoor flood and drain set up for next season

indoor plan is:  seed - mother - clones in 1-2" rockwool 

outdoor plan  is: - rooted rockwool clone with 100% super coarse perlite  (large 5-10mm) all around in a 3" net pot in a 20l bucket mounted on the lid for a recirculating flood and drain  
                          - area for grow will be up to 2.5 meters high, plan on making a green house with 30% shade cloth and clear corrugated poly roofing 
would the 3" net pot support the plant ? 
would a 3" net pot vs a 6" net pot reduce yields?

in between flooding i figure the roots outside the net pot will be fine in the bare air in between flooding? 
i wont be cooling the nutes down in summer or doing any temperature regulation other than nute tank under the veranda /carport  , will this be a problem?

thanks :bounce:  

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