LEAVES CUPPING

[nick8]

i got 4 autos into a 60x60x180 cm hps 250w grow tent.Temp and humidity are generally ok(29 C and 50% RH) into my tent.Is it possible ,my plants to get burned from the oscillating fan or from inline fan?My leaves are cupping.What should i do?

 

[hotrodharley]

Have you fed them anything?

 

[nick8]

no

 

[hotrodharley]

What soil or medium are you using? Is it the first time you used this same soil or was it used for a prior grow?

 

[sworth]

You may need to lift your light higher, or reduce the temperature generally.
Cupping is the plants way to reduce water loss and/or heat impact....

 

[daloudpack]

You may need to lift your light higher, or reduce the temperature generally.
Cupping is the plants way to reduce water loss and/or heat impact....

agreed cupping is usually a sign of heat stress