upward curling / cupping leaves no idea as to cause

[thatreallystonedguy]

Leaves are curling / cupping upwards thought it may have been nute burn so I halved the nutes in the resivour and flushed the grow media. (Tips were burnt / yellowing as you can see in the pics when i had it in the smaller orange pot)

 

Growing in autopot hydrotrays with 50 50 perlite vermixulate using autopot nutes.

Edited June 6, 2018 by thatreallystonedguy

[bakedcake]

What’s your temps & humidity?

[thatreallystonedguy]

Temps between 15c at night and 28c daytime humidity would be close to ambient which is 70% today.

(getting a temp/ humidty sensor tomorrow) only have temp at the moment.

[bakedcake]

Ok cool it may be related to heat stress as they curl their leaves up to stop perspiration I believe I read somewhere so maybe a bit too hot for it. No bad growth so i feel you will be fine. Also look up a VPD chart from just4growers just recently got told about this and it is a good tool. Pretty much gives you ideal temp to humidity for your plants

[thatreallystonedguy]

Awesome thanks for the tip about the vpd chart and the advice, they are in my new tent now and the temps more stable 22 - 26.5 and 50 - 70% humidity.

Going to just see how they go doesnt seem to be getting worse and as you said the amount of groth looks fine so I guess I'll just wing it.

Thanks again.