Marijuana Leaves Curling and Crispy

Tips, Tricks

1. Check this site out!
   
   http://www.growweedeasy.com/phosphorus-deficiency-cannabis
2. I have leaf curling and brown spots like it was burned brown what is this issue guys any help ????
3. PINEAPPLE EXPRESS IS REAL?? I GOTTA TRY THAT
4. is it detrimental to have some bad leaves?
5. Eustathios “Big-Eddie” Vanight .....
   I don't think so....I don't even have a co2 monitor.....my Cap propane burner come on an hour after the lights come on and an goes off and hour before the lights goes off. There is such a thing as too much co2 but if u could some how produce that much..which I doubt....it would hurt u before it hurt the plant's
6. Nice
7. i got kinda the same thing going on. on my super lemon haze it doesn't look as bad as that slight corkscrewing. you narrow it down by now?
8. it need's more food I have the same problem
9. make some oil with that
10. Oh man! I've got that same exact thing happening on my blue dream and strawberry banana plants. it's not light burn Cuz I've raised my lights almost all the way up to the celing. and I've noticed most of those wrinkly, wavey, curly leaves about half way up the plant and the ones at the top I've been taking off hoping it'll go away. someone told me it could be broad mites and so I've been spraying. but I really don't see and bugs even with my X100 spectacle. how do I properly flush the nitrogen out? if that's another thing that could be doing it to my poor babies leaves?????
11. Nitrogen toxicity or root problems would be my guess
12. Its when a plant has to much light for that strain the leaves try to turn away to capture less light stage after would be if not fixed can get heat scares but anyway my opinions as good as the rest gud luck
13. Wind burn
    
14. looking like high salt content to me bro...the leaves are drying out because the salt content in the root zone is too high, forcing the leaves to dry out and curl...clear potassium issue from overfertilization....check your runoff properly.....you dont want anything over 3.6EC on the runoff...ever
15. Looks like too much nitrogen to me. Leaves look very green. Sign of significant nitrogen in the leaves. But I'm not a cannabis farmer. Grew up in s Georgia and have grown many veggies. That's just the first thing I thought. Am I wrong? Probably lol.
    
    Last year my second crop of tomatoes for 3 plants totaled just over 10 dozen. That was even a new record for me. Your plant looks perfect....then nitrogen burns like that sneaks up on you like BOOM!. Best thing to do I think would be to run it all out with excessive watering to clean and dilute the nitrogen for it to expel. I know what works on tomatoes though.....some 10-10-10. Great for grape vines too. Later
16. leaf curl or taco shape is often Mag deficiency or pH issue.
17. I think it could be too much wetting agent when foliar feeding, that caused me similar crispy leaves in the past
18. With all the snow and temperatures in the single digits for the last couple of weeks CO I'm thinking the humidity is super low and when your humidity in the room gets low your plants aspirate quicker which pulls more (too much)nutrients through the leafs. Good luck Dude. 
19. Might be heat stress. try dimming the ballast for a a couple days. or raise the light.
20. Any update on this?    I've had the bottom single leaves curl a bit, but not the fan leaves.