Quote Originally Posted by Dorje113
Also, the pH of peat moss is about 4, perlite is mostly neutral, and he's watering with water in the low 6s. What are the chances the soil pH is way too low?
He said he uses a soilless mix. (with added perlite...?) Usually that means a peat-based mix, which most contain buffers added by the manufacturers. Were he growing in straight peat with added perlite, I might entertain the possibility. Most all of the potting mixes I've tried are buffered to near neutral ph, (6.6 to 7ish) so no... I do not think it's a ph problem. No way he could have burned-through the buffers already, and it looks like overwatering. And yes...even with additional perlite, you can oversaturate.