HELP! Yellow leaves

[Diesel200034]

Hi I’m on my 3 rd grow so still beginner . I grow in pro mix 4x4 with 315 cmh light temps and humidity controllers . I use for farm trio , my girls are 4 week of veg about to go from 1 gal to 5 gal pots but I’m getting some yellow bottom leaves my ph of run off was 6.2 to 6.6 but my ppm is around 1200-1500 is this too much nutes ? Should I flush down with the yellow I thought was nitrogen so gave them a compost tea with bat guano recharge earthworm casting and molasses and seemed to perk them up . should I just transplant them and not flush them ?

[OldManGrower]

Personally, I feel that your PH is too low. Some of the leaves display classic nute shut out, due to low PH. Perhaps add a little cal mag as well.

[Rwise]

PH looks in range kinda, but could be better, for soils 6.2-6.5 in veg then flower at 6.5-6.8. The yellow leaves will not green up, it is eating them for their nutes. Most likely root bound unless those pots have a lot of extra holes in them. Yes I would transplant into larger cloth pots.