Indoor leafs curling

[dkauto]

My plants leafs are curling why can that be ?
They are 9 days old and some of them started to curl 5 days ago just a tiny bit at frist, so I thought it would pass. I had kinda high temps the first week around 30-33 c but I fixed the problem so the last 2 days they have had 24-27 c but some of them still curl, i will post a pic asap

 

[Muddy]

That looks like classic heat stress. What kind of light are you using and how above the plant? Also, where are you checking the temp at? Should be measured at the top of the plant. Also, how is your humidity?

 

[dkauto]

Hey there and tanks for the answer, im using 600 w hps light its around 45 cm from the plant at the moment, i do check temp right at the plant tops, and humidity is around 45-55%. Well the heat was also what i thought was the problem i just found it Odd they do it Even in lower temps, but it have only been fem days with optimal temps so I mabye should give it some time before i panic

 

[Wait what?]

I'd back that light up to 2 feet or more. They're very sensitive the first few weeks

 

[Muddy]

Hey there and tanks for the answer, im using 600 w hps light its around 45 cm (45 cm = 1'5-23/32") from the plant at the moment, i do check temp right at the plant tops, and humidity is around 45-55%. Well the heat was also what i thought was the problem i just found it Odd they do it Even in lower temps, but it have only been fem days with optimal temps so I mabye should give it some time before i panic

Humidity is good. If those leaves are dry along the edges they probably won't straighten back out. Watch your new growth. If it doesn't curl you're good.

I'd back that light up to 2 feet or more. They're very sensitive the first few weeks

I agree. 600 watts is a lot of light and heat for seedlings and small plants. Raise it up some and watch your node spacing. Raise or lower as needed to maintain it at around 1/2". Once they go into full flower you'll be able to run the light closer.

 

[dkauto]

Okay thanks alot Guys i raised it now