Northern light looks droopy

Hey all,

So what you see here is nirvana's northern light fem in 15 litter pots 1:4 soil & compost, water twice a week 1.5 litter each pot with growing fertilizer every 2nd/3rd watering.
Average temp is around 30 Celsius / 80 fer, 14 light hours, outdoor grow.

My problem is that one of them started looking droopy / withering two weeks ago after a very hot day and stayed looking like that. Her other sisters joined her a couple of days ago (no special heat strike lately or anything).
When I water the plant the soil feels a little moisturized half way into the pot so i guess no lack of water.
The pot has holes on the bottom.

Any ideas?
I'm thinking its just too hot. Maybe a shading net? though it would look kind of obvious..
Would love hearing your ideas.

Thanks

Hey man that looks like its from heat in my opinion.? Maybe she could do with a litle more N to?

Yea im beginning to think maybe i dont use enough fertilizer. I'm using some general 8:2:8.
I think ill add compost and fertilizer 2x.

How warm are the pots? The cooler you can keep them the better. They may like some cool water right around when it starts to get hot if you can give it to them.

I can only get there twice a week
dont know how warm the pots are. guess the same as the environment.

You're over watering