I could use some help identifying this issue... These pics are from two of my largest of 8 plants and are the only ones that exhibit this leaf problem and only on the lower leaves (not on new growth). The blotches look almost like a shiny metallic bronze color which was hard to capture in the photos. I am growing in 1/3 coco, 1/3 perlite, 1/3 Ocean Farms potting soil. I have been using 50% of the recommended Emerald Harvest nutes until the last feeding where I planned to move it up to 75% for their Early Veg feeding schedule. I use RO water with 100% of the recommended Emerald Harvest Cal-Mag (5ml/gal) for watering and feeding as I have always done. I increased the feeding amount to try to get better yields. The last grow yielded nicely though at .51 grams per watt under my 1000W MH bulb. It sort of looks like a Phosphorous deficiency but none of the other 6 plants exhibit this. In the Phosphorous literature I read said cramped roots could create this deficiency. These plants are ready to be transplanted out of their 1/2 gallon grow bag to my larger 5 gallon pots but was waiting a bit for the others to catch up in size. I may transplant them in the next day or two. They are about 24 days old since the seeds popped. They did not show these signs at all until 24 hours after yesterdays feeding at 75% concentration. The pH going in yesterday was 6.0 and the drain to waste run off was 6.4. My previous grow (my first one) had no nute or bug issues to report.
Other than that, I don't really have any other plant issues. Any advice from all of you experts out there on how to fix this before it becomes a big problem?
Other than that, I don't really have any other plant issues. Any advice from all of you experts out there on how to fix this before it becomes a big problem?
