Once a day is the minimum. I FED (never plain water in Coco) twice per day in Veg & 3 times per day in Flower. It's not much fun when you do more then 4 plants & you have to feed each one a gallon in flower 3 times per day. Auto Pots or a Drip System for Coco or I aint doing it !Thanks @StoneOtter ...I'm really proud of these 2.Just started 2 more girl scout cookie extreme.learning organic im pretty happy about Looking forward to a coco perlite grow also.I kinda like the idea of watering every day.lol