Do soiless mixes require flushing during the flowering process? Flush in the last 2 weeks of flowering? My 1st grow is in day 17 of flower process. I am using liquid organic fert.s diluted in water @ 3 Tsp.s of 5-10-5 Age Old Grow per gal. of water and the plants are flowering nicely. Any tips from growers who have prior experience with soiless mixes would be appreciated. Cherrio!