OG kush run

All the Dinafem OG have started yellowing already, which I don't think is due to finishing because of how the buds looks. I'm thinking it could be a low pH in my medium so flushed with calmag and micronutrients at a slightly higher pH followed up by a feeding at a slightly higher pH, will see if that helps. Smells really starting to come through now, smells really really dank. Buds dont seem to be growing much, or less than I'd expect at least. Could be linked to the yellowing leaves, I'm hoping they really start to fatten up these last few weeks. Started using GH feeding for bloom boost and calcium, trying to cut the nitrogen out completely these last few weeks. Haven't used the bloom boost before, hoping it really helps those nugs get fat! I've used the calcium before, just supplemented magnesium by adding epsom salts and seems to work really well, didnt have any deficiencies last time I used it and got a really nice fade.