Okay, that sounds like too much lime. Problems with soil pH going HIGH aren't all that common in soil.
Just out of curiosity what are you using to check pH, and if it's a meter, have you calibrated it recently?
High pH often has its own 'look' to it, which is why I guessed at low.
Lime gets used up over time... this is why I tell new growers to go with a humus based medium rather than peat. It has its own internal pH buffers that don't depend on an outside substance [lime] to correct for the inherently low pH of the substrate [peat].
stinkyattic Reviewed by stinkyattic on . Wierd yellow and Brown Spots Please Help These Clones are about 3-1/2 weeks old, still in veg 24/7 schedule. Half are in Bio Bizz Coco mix with perlite and the other half are in some Premier shaphnum peat moss with perlite and some dolimite lime. They are both showing the same spots so I dont think its soil realted. I am feeding them Botanicare Prow Grow, Liquid Karma, Cal-PLus Grow from advanced, with R/O water. They get feed every 3-4 days when the pot feels dry. I have been trying to give them 2 normal strength feedings and then 1 Rating: 5