New person here, lurked for a while, learning. Name comes from my hang glider flying.I am bringing up a combination of GSC, Strawberry Tahoe, and NYD. Leaves are turning grey/brown and brittle after getting to mid-size. They look like the phosphorous deficiency in the Plant Abuse Chart. When I transplanted the clones, they went into Kellog Organic potting soil. At first, they went nuts, with nice big green leaves and good spread without stretching. The soil PH reads between 6 and 7 with a twin probe meter. I tried CalMag in a foliar spray to no effect twice 5 days apart. 18 hrs light, 6 hrs dark. 600 watt HPS 4' x 4' area. Shop swamp cooler to keep the space cool and in line 6" fan for the light. Cooler and light fan are thermostat operated. Oscillating stand fan under the light. Afraid to try nutes in case it worsens. Tried SuperThrive, then a week later, took the babies outside and flushed the living hell out of them with fresh water. Soil PH still read between 6 and 7. Please help out an old newbie. I don't know how to add phosphorous ( plant abuse chart said it was rare) THANKS!!!
