fertilizer and nutrient troubles

[600w]

i brought some clones and a couple of leafs where brown curled up and hints off yellow.

there around 5 inches tall now should i be using nutrients yet?

im using growzilla.

600w
16" off top
2 fans
4 plants
40ish RH
26 C

 

[FlynLow]

dont nute it till the roots have some time to develop and start at a 1/4 dose. curling leafs can be due to heat stress from your light try raising it
good luck

 

[600w]

dont nute it till the roots have some time to develop and start at a 1/4 dose. curling leafs can be due to heat stress from your light try raising it
good luck

cheers. its only the bottom leafs curling. the top is fine. ill stop the nutrients for a couple of days.
thanks for the help