Anyone know what this is?

It's only on 2 of 5 plants and plants look fairly healthy otherwise.

wow still no replies....bump

im pretty sure its nute burn or a mg defiency not positive thogh there is a thread diagnose your plant problems or something like that searh it down or it is posted as a sticky at the top of the nebie forum i believe or one of them anyway good luck keep us informed

Sorry missed it somehow, never seen it but here is the best link I've found

http://www.icmag.com/ic/showthread.php?t=11688

Good Luck

Here's that thread:


https://www.rollitup.org/marijuana-plant-problems/216537-self-diagnose-your-plants.html

https://www.rollitup.org/general-marijuana-growing/1469-marijuana-plant-problems-cures.html here it is check it out the only reason i say to check it out is im not the best yet at diagnosing problems wish i could help better

looks like mag def could be from lock out if ph is to high or low does look like nute burn it tends to leave the tip all toasty and so on could be wrong though . gl hope i helped if not srry

looks more like calcium def