To note, these are just some of the damaged leaves. All the Damage looks basically the same. Also the damaged leaves are evry crunchy. Some of the highly damaged leaves have been pruned away.

what happened?

to much water or what?

Dunno, you tell me

It kinda looks like nut. brun, but i could b wrong. need more info the pics help but have u been feeding, what is the temp of your grow room. and it does not look like you over watered it, but put something to tie it too so it stands up.

Sorry I should have mentioned I have it purposely growing that way so to keep it low.

I'd say you need beter liting

Are you using clean water? It looks like a water / soil issue.For the heighth of her she doesnt look like she has had a good life. Get a soil PH meter and check it out. Looks like bark in your soil, this can have a very acidic reaction to the poor girl. Good luck need more pics of the entire plant. Does your soil drain well? Doesnt look like nute burn. Normally with that the end of the leaves will get rounded and malformed rather quickly.

What kind of lights are you using? How far away? What kind of Nutes are you using and what's your ph? Answer as many of those questions as possible to the best of your ability and I'm sure you'll get plenty of great advice on how to solve your problem

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Tomorrow I'll take a full report with more info. Right now 3 plants are only getting distilled water. 1 is getting Nute Spikes (14-5-5). 1 is getting "acid loving plant" miracle gro fert. 1 is getting fish emulsion. I have 60w of flouro tubes 1-2 inches from plants. I'll get more photos and such tomorrow though.

Did you spray bug spray on them? Are you misting with nute solution or water? Would also suggest that you get a balanced nute solution and check your own ph .