5 gal fabric pots
Organic soil with worm castings
Watering 2x a week 1/2 gal each (1 feed per wk)
SF 4000 light at 40% - 20” from top
Plenty of air flow
Ok, I have been feeding these since about 4 weeks old. I started with a 1/2 nutrient dose with the big bloom, grow big, cal/mag always ph’ed around 6.3-6.8. They did fine. Ok, so I went up to a full dose (according to the FF nute schedule). Only feeding ONCE per week 1/4 gal per plant. (I use sledgehammer every other week at my reg water feeding). They were doing fine and I saw some rust spots on the top growth. I assumed it was light burn since I have been giving plenty of cal mag. So I turned light down. New growth had no spots, thought it was fixed. A week later I was seeing even more spots, so I was thinking this must be a problem with the ph at the roots or the PPM. So I checked run off ph. It was within range. PPM run off was 2000-3000!!! I had been inadvertently been feeding them really heavy (1500ppm) and didn’t realize they were having build up. I assume the cal mag rust spots are from salt build up causing it to lock out the cal mag. So I flush. A few gallons each regular ph’ed water. This brought PPMs down into the 900’s where they should be. The day I flushed was a feed day so I skipped feed that week (this was the Sunday before last). Put a fan on the pots to get them dry within the 3 days, come Wednesday they were thirsty again. I used reg water to get a run off reading again. The ppm was back up to being super high. My thoughts are I was not watering enough quantity and they were over drying which created the nutes to become immobile like that. So I flushed them Wednesday last week. Big mistake! By the Sunday after this (4 days after flush, this was this past Sunday). They were pale and looked horribly hungry. I fed them a 900 ppm 1/2 gal each mixture. They seemed better but they are still pale and yellowing. One looks just yellow and pale and another looks like it has a cal/mag or zinc deficiency. It’s got the dark veins. These were supposed to be easy to grow and they have been a giant pain in the ass. The last strain I grew loved the feeding schedule I was using (same as I tried here). I want to flip these to flower but they need to get healthier and back on track. I’m at a loss at this point and all I can think is they are just malnourished, for whatever reason. I can’t imagine flushing them with ph’ed water would throw their ph out of whack since then. Sigh. Please help.