your plant needs some more N (maybe some magnesium as well), after 5 weeks you should be feeding em regularly. do a half-strength feed and see how they go in a few days. if the leaves get darker but you still have some lighter patches between the veins then try some magensium as well (epsom salts).

NL is very tough with nutes so overfeeding has to be extreme to cause problems. I think you have probably been too cautious with the feeding.

apart from that they look healthy so i don't think you're overwatering. its a good idea to let them get dry out a bit every now and then - I wait for the bottom leaves to begin drooping a bit before every third watering.

pre-flowers usuall appear after the 5th node - but your gonna need some magnification to seem them initially.

I use evirolites and as long as the leaves are not touching the tube it'll be fine - the closer the better, i have mine 1-2cm away.
emmpey Reviewed by emmpey on . yellow/lime blotches on leaves? Hi, Chester here. First time personal grow and I am about 5 weeks in with 4 plants. I started noticing that some of the leaves have yellow/lime green blotches on and I'm concerned beause it appears to be getting worse, albeit very slowly. Plants still seem to be growing, but I just wondered if this is something I should be particularly concerned with? My soil pH is 6.5-6.8 and I recently installed a dehumidifier as the room was showing 90+% humidity, although I am waiting on delivery of Rating: 5