Sgottinoanswered grow question 4 years ago Depends of plant's needs XD. Give near 400/500 ml of osmotic water when the upper 3 cm of soil is dry (every 2 or 3 days) and feed with nutrients just once every 7/10 days, if you are growing an autoflower give a half less of nutrients in shedule. BE SURE OF CORRECT RETENTION OF SOIL.