Indoor Leaves curling up and clawing inwards.

[masta chiefa 420]

Problem: My plant leaves are Curling up and clawing.

Medium/grow method: Soil, Fox Farm Ocean Forest.

Feed: and supplements used: Advanced Nutrients Ph perfect Three part Grow Bloom and Micro at 16ml per 4L and B-52 at 8ml per 4L and Mammoth P at .06 per 4L.

water source: Spring water PH at 6.8

Strain/age: Jawa Kush (Jawa pie+ghost og) week 3 veg.

light used: 400 watt metal halide 18/6

Climate: Daytime 75f-90f Nighttime 60f-65f humidity 40%-65%

Additional info: Been showing signs of stress for little over a week and a half.
Pics:

 

[Sleazyb]

Looks like a heat issue to me. 90 is up there. Id work out a way to lower temps

 

[karlkutta]

I'm a noob but to me this doesn't look bad. But one of the professionals is better suited to judge this, not me.

 

[karlkutta]

But, I have some questions.... Have you been giving nutes? Since when? And those 5 gallon buckets are big, are you going outside with this later on or how long do you think you will keep them in veg?

Thanks!

 

[Waira]

...yup. most likely heat stress, bad VPD (vapor pressure deficit) with the high T and low RH%,.. this is basically about how T and RH% affect transpiration rates, CO2 uptake, etc.,.. read up on it in Reference section! A lot of important dots will be connected, you'll see-

 

[karlkutta]

...yup. most likely heat stress, bad VPD (vapor pressure deficit) with the high T and low RH%,.. this is basically about how T and RH% affect transpiration rates, CO2 uptake, etc.,.. read up on it in Reference section! A lot of important dots will be connected, you'll see- [emoji106]

So, since controlling temps can be tough, at least for me, should be raise the rh? And best to reference the vpd* charts?

 

[Illini4life]

So, since controlling temps can be tough, at least for me, should be raise the rh? And best to reference the vpd* charts?

You can run at a higher temp possibly with additional co2 in the tent/grow area. Just what I have researched. When I got up into the lower 80s in my tent I started to get a little leaf curl so 90 is way too hot