Stawdarg leaf twist and sides of leaves curling up with pics

[Little1985]

Hi guys just wondering if anyone can give any insight into this

3 weeks into veg and the leaves are twisting and curling up on the sides they have done this all through veg really but have gotten worse as they have got bigger

Growing well just look strange
Temps are good no nutes yet as have used batmix so maybe next watering I'll add the first feed

Any ideas guys

 

[VanIslandConnoisseur]

Heat/light stress, to fix just raise light 2 or 3 inches, hope this helps!

 

[Little1985]

Lights are a good distance away already

 

[VanIslandConnoisseur]

Whats the temp, also some plants like less light.

 

[VanIslandConnoisseur]

Also when do you water?

Humidity?

 

[Little1985]

So the lights are 37 inches away
I water when the pots are light and humidity is sitting around 35
Temps between 27-28
This is a smaller one that's just started to do it

 

[VanIslandConnoisseur]

The temps are too high for the airflow you have, so regardless, try and keep it 23-26, sounds like you need more airflow imo!

Humidity should be min. 40 and max 80 for veg imo, i shoot for 40-60

I think air flow is the problem sure hope i nailed it this time

 

[Little1985]

I'm using a 10 inch carbon filter with a 10 inch iso max inline fan
2 oscillating fans
I think you maybe right with low humidity as it did drop to mid 20s but that was when pots was drying out

 

[VanIslandConnoisseur]

Its the humidity then, they need it as they transpire so fast and i think the roots cant keep up so the plant starts to shade itself, get same stress look from light too close, has happened to me.

 

[Little1985]

Really struggling to get humidity up to be fair
Used this set up for about 2 years with no problems with regards to humidity

Maybe this strain just doesn't like low humidity
Thank you for the quick reply

 

[VanIslandConnoisseur]

Really struggling to get humidity up to be fair
Used this set up for about 2 years with no problems with regards to humidity

Maybe this strain just doesn't like low humidity
Thank you for the quick reply

Your welcome, thats just it, there all a little different. Try foliar feeding with water and do it every 15 mins for like an hr and see if they freshen up!!

 

[VanIslandConnoisseur]

Buy some totes and fill with water and aerate, that may help your problem!

 

[VanIslandConnoisseur]

Also how big is your tent? How many cfm is your intake and exaust? Have you tried exausting a little less and have colder intake air to balance heat?

 

[Little1985]

Will spraying them with water with lights on not burn them
Space is a bout 3m by 3m I think not 100%
What's the cfm the airflow it says is 1480m/hr

 

[VanIslandConnoisseur]

So like 9.99ftx 9.99ft?
How tall?

 

[Little1985]

2.5 - 2.7 metres maybe

 

[VanIslandConnoisseur]

Ok, yea sounds like humidity. With those small plants you could decrease exhaust to lower humidity, plenty of co2 for the biomass!! Now temps go up. So now temps are the issue. Lower the temp of intake air and decrease exhaust speed and youll be laughin, the others will do better too!!

 

[VanIslandConnoisseur]

Just remembered you cant have high temps like that with low humidity because your not creating good VPD, Vapor Pressure Defecit. Plants have to a certain amount of humidity in high temps, naturally occurs outdoors.

Look up vapor pressure defecit on youtube, check out john berfelow

 

[VanIslandConnoisseur]

Here you go!!

 

[Little1985]

Might be the case been abnormally hot for this time of year here so not really getting a very cold air intake in the day

Might have to buy a small humidifier see if that makes a difference