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I am having a similar issue here: https://www.rollitup.org/marijuana-plant-problems/253529-yellowing-top-leaves-veg.html#post3379440 Same thing you think?

It appears my problem isn't going away....I've increased nitrogen by double (really should be plenty) and I'm always careful my PH is around 6. What gives? Any other possible diagnosis? It does seem that unlike a nitrogen def, the whole leaf isn't turning straight yellow uniformly...the...

Just a quick question that I can't find a clear answer to: Does plain RO water need to be pH'ed? I have read some information stating RO water will quickly assume the ph of the growing medium (only if there are no other nutes in the mix). I know to adjust the PH of my feeding mix but I'm not...

Appears to be getting worse and now some of the newer plants are showing symptoms as well. I've narrowed it down to either fluctuation in PH or high temps (high 80s). Some further insight is appreciated!

Here's pics.... Damage seems to be uniform over nodes....pairs of leaves seem to have the same discoloration. Black spots have appeared on some as well.

I guess my question now is should I be watering every day or every other?

Hi there! First grow, hempy style. I've got one plant 3 weeks ahead of the others and i'm worried about some yellowing on new leaves. The new ones I've started use perlite/vermiculite mix so i tihnk they will retain water better but the old one is 100% perlite....I'm thinking maybe it's...

Another quick question to add on - does it make more sense to have your carbon filter on the intake of the cooltube inside the growbox, or attach it to the exhaust outside the box?

Hello! I have a few questions about a stealth scrog cab I'm trying to make (I've decided to go the route of converting a desk/cabinet thingy rather than use rubbermaids). I'm new to growing but have already completed my first little CFL veg cab, got a couple bagseed sprouts to pop up, and I'm...