My healthy looking leaves are slightly curling

[waayne]

@Frank Tan you might pick up a little humidifier similar to this at Walgreens
Looks like your RH is a bit low,it should be around 70%

 

[Frank Tan]

Thanks Waayne ! Should I keep the RH around 70 for the whole grow?

 

[waayne]

No
I'd drop it back to around 55% when they start flowering heavily

 

[Frank Tan]

I might have found the problem with my curling leafs. When the lights and fan goes off and they have a sleep the humidity goes much much higher. Any advice ?

 

[Toaster79]

Keep the fan on 24/7. They won't mind it ;)

 

[Frank Tan]

Thanks Toaster, I will keep the fans on and leave one of the vents open in the tent so air keeps circulating.