WOW !!!!! after checking the root maas with a 5 gallon to a 3 gallon - in a 5 gallon there is so, so much "not'used" dirt so to say - 3 gallons might be better - your grow indicates thisThe best auto for me was dinofem xxl amneisa xxl in 3 gallon pots with coco gave me 18 oz dry from each plant
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Happy growing you know it makes sense