leaves curling at the edge

[marcus44]

My first plant is starting to show curling along the edge of some of the fan leaves. There is also drying at the tip. Overall color of the plant is a lighter green than my other.
It is under a CFL Ott plant light. The other two are under a CFL 100w.
I am suspecting Nitrogen is too much, so added in some sulphur. I used potting soil, a local brand, adjusted the ph slightly., and have begun to give it , all of them, a 10-15-10 from Schmidt's.
I am getting some Big Bud worm castings.

It's the leaves curling inward which are giving me concern.
Any ideas?

 

[Gordon d'Angelo]

a pic wud help if the leaves are curling up it could be heat stress but wud need a pic to be sure wot was your ph reading ?

 

[Ms.Fox]

Sounds like a heat or burn issue. ^ I agree, a pic would be helpful.

 

[marcus44]

I posted some pictures in my gallery. I do not know how to upload into a post.
I think I may have given them too much nutrients.....
I am going to flush the container.

 

[Be Irie]

Hey Marcus, How old are the plants? What are the temps of the room. Look at the how to upload pics link in my sig....

 

[marcus44]

Okay,
The plant in question is 2 months and a few days. It has a Ph of 5.3, too acidic, yes? My younger plant also has the same Ph. I did put sulfur in when the last Ph measurement was too alky.
My third is robust with a Ph of 6 and is taking off. Good genes, I guess.
I have Big Bud in the house, but was not going to begin that until the flowering stage.
I have also used Schmidt's 10-15-10, diluted.

 

[marcus44]

You can see the drying out and curling along the edges. There is also some splotching.
Color is not deep, healthy.
There is a lot of growth and it is being LST

 

[Bobby44]

wow man im right there with you, mine were super healthy until two days ago, one plant has curling leaves, kinda folded inward too.
https://www.420magazine.com/gallery/data/500/xx1.jpg