Help! Leaves spotting brown & curling up and drying out.

[purpleyurple]

Hi all.

I've looked around and nobody seems to have the same problem I do, besides it being potentially over watering.
Please help! new grower stress is getting to me. every day it looks worse.....

Since these photos were taken the leaves have become worse. The effected ones are starting to yellow more and some have curled up and dried out and are almost ready to die.


It's just a regular outdoor grow, regular potting mix (potentially low pH though). I move them inside under 2 36w Fluoro tubes of a night time to get the extra hours to make up 18 hours or so.

Help!

 

[Inthewind]

Check this link out. You may be able to find something in the thread. It's pretty comprehensive and very well done.

Plant Abuse Chart

 

[Inthewind]

And theres also this one:

Some plant deficiencies - Blogs - 420 Magazine ®

From what I'm seeing I'm thinking PHOSPHORUS (P) deficient.

 

[Inthewind]

Cannabis Plant and Pest Problem Solver - Pictorial

And one more. This one shows a good pic of phosphorus deficiency.