Some pics would help alot! Sounds like you could have a pH/nutelock issue. Have you checked the pH of the runoff? It should be in the mid to upper six range for soil.

Rootbound is definitely possible with 2 gal pots. I would check that asap. Also, rainwater is usually not a good idea unless it tests ok everytime. It can contain all sorts of nasties, and its very variable in quality.
dillhole Reviewed by dillhole on . thin small leaves on some other fines also yellowing I got 2 hashberry and 3 other randoms in there and the randoms oddly enough have the large fan leaves and for some reasons the hashberrys have much thinner small leaves... 2 400 watt hps All in in fox farm OF All in 2 gallon pots 2 weeks into flowering rain water for regular flowing tap water plus botanicare nutes for ferting (high 6 ph) The 3 that were topped seem to have yellowing of the lower l leaves and thin fan leaves, so im guessing they could possibly be root bound? there Rating: 5