Hi all, First time grower here. Been trying to figure this one out with search and google but I'm out of ideas. This girls is on her 28th day - 250w HPS in a small 60x60cm (4inch RAM exhaust). PH level read 7 - 7.5 Pic1 As you can see she has white marks on her upper leaves, and some 'burn' spots on others. She also had yellowing of the lower leaves (trimmed all the worst affected). Earlier this week she was looking worse, with all new growth with white marks and suddenly quite slow growth (before that she had been great). So she had the first round of nutes (Tomorite), and raised the lights up which helped a lot overnight. also bought some Cal Mag in case it was an iron, or magnese deficiency, which was given to her 48 hours ago which helped-ish (less than than the raising of the light and Tomorite). Pic2 Is from before all this happened about 7 - 9 days ago As the title, do you think this is a deficiency or just light/heat stress? Very wary not to over-counter it and make problems worse. The new growth at the top doesn't seem to be affected. There has been with low humidity levels (around 30 - 40) which I corrected with humidfyer when really low and spaying walls of tent in case that's relevant. I am aware that a 250w is fairly big (?) in such a small tent so maybe it was too close (followed guidelines on here). Thanks lads Seed is O.G Kush RQS

Hi, I have four cuttings of Elvis - very robust and problem free grow - and all four are showing yellowing new growth. Problem in more detail: - Yellowing from the stem, outward to the tips - New nodes growing tight together (stunting) - Central leaf viens and stems sowing purple - Some leaf tip burn Background: - The cuttings were held small for around 8weeks. - Potted up into 3lt pots 10 days ago - problems showed in the last 2 days. - Feed is ec1.2 - 10ml Ionic grow and 1ml calmag (mum was on ec2). - Pots are 22.4c at base lights on and no less than 20c lights off - I have not been able to probe into the middle of the medium. Ambient temps are nice. - Water ph is a little alkaline, but Elvis mum showed no issues at all - perhaps the water supply has changed?? I have some ideas - nute lockout causing iron def - or possibly mag def (doesn't really look like mag def to me though) - but hope someone can confirm or shed light on the problem... Their mum grew out in an 11lt pot (so better resistance to temp shifts) and had no issues whatsoever throughout the whole grow - water and feed are the same for the mum as for the cuttings. I lieu of a better one, my plan is to flush tomorrow and start them back on a 0.7ec feed... Many thanks for any thoughts!