V-shape/cupping leaves

hugetom80s said:

Just don't change a bunch of stuff at once, because then you don't know what change made the difference or worse, you end up with the changes canceling each other out and it looks like nothing worked.

Click to expand...

Or, you do two things and you can't figure out which one (or both?) killed 'em. argh.

i had that same problem i had a few sugestions like heat issue and nute burn, just like you only the top leaves curled, that is heat issue, just keep well faned and i would also sugest you flush and use water ph 5-6(mine 5. for a week and see wat happens mate...and keep away from that wife beater, its a killer mate hahaha

Seamaiden said:

Or, you do two things and you can't figure out which one (or both?) killed 'em. argh.

Click to expand...

Exactly! It's tempting to try to save your plants when something's wrong by trying everything you can think of, but it just doesn't work out that way most of the time.