BINGO.
Your root zone could be too cold. Cold roots=inefficient ion exchange=not getting nutes up as well as they should. Plus did you know that most problems you will encounter with pH and overwatering are compounded severely by cold dirt?
Get those pots up off the floor a foot or so. You seem handy...
stinkyattic Reviewed by stinkyattic on . problem with top leaves I have a problem with the top leaves of my plants they're in flowering for 1 week now but here's some pic took in different days always the same problem! Rating: 5