Leaf tips curling down and brown

[Nabber83]

Hi
I got a clone 1 week ago and have no idea what week of growth it’s in. Trying to determine what is causing the leaf tips to curl down and slowly turn brown. Wondering if it needs nutrients now. Transplanted in Pro mix Organic moisture control soil.

I am using a full spectrum 400W LED grow light and not certain what height I should be above the plant. Maybe it’s getting too much light. I’m new to growing so any help is welcomed.
Thanks

 

[Phytoplankton]

The first thing I’d do is raise the light, I’d go 30 “, but follow the manufacturers recommendations. There may be other issues, but I’d start with that. It could be the pics/phone but there seems to be one plant much darker than the others.

 

[taproot]

Hi
I got a clone 1 week ago and have no idea what week of growth it’s in. Trying to determine what is causing the leaf tips to curl down and slowly turn brown. Wondering if it needs nutrients now. Transplanted in Pro mix Organic moisture control soil.

I am using a full spectrum 400W LED grow light and not certain what height I should be above the plant. Maybe it’s getting too much light. I’m new to growing so any help is welcomed.
Thanks

How close are the led's and are you running full power? Second, what is the temp and humidity? The soil has nutes in it already right? Leds require running the room a little hotter than hps due to them not having IR. I personally found 80-85F worked well for me.

I've not used this app yet since I'm not read for it but it might help you.

Photone - Grow Light Meter - Apps on Google Play

Keep The Guesswork Out of Grow Lighting: Measure PAR / PPFD for Plants

play.google.com

 

[Nabber83]

My led light is actually 600w and right now it’s sitting 16 inches above the top of the plant and it only runs full power. The soil does have some nutes in it yes. Not sure how much or what. The room is 80F but I’m not sure of humidity. Just going to keep them in the house until they’re ready to go outside for the summer. Maybe I’ll try the app

 

[taproot]

My led light is actually 600w and right now it’s sitting 16 inches above the top of the plant and it only runs full power. The soil does have some nutes in it yes. Not sure how much or what. The room is 80F but I’m not sure of humidity. Just going to keep them in the house until they’re ready to go outside for the summer. Maybe I’ll try the app

I thought the 1st post said 400W. Is it 400 or 600W? What brand, some of the 600W you get off of aliexpress might only be 300W. Anyways if it is 600W that might be a little much at full power and if you can't dim it you need to raise the light. I generally started my light at 24in (2ft) above my small plants at 60ish power wise and lowered it down over several weeks a little at a time until I got to about 16-18 inches off the top at full power. Light burn is real and leds are the first time I experienced it. If someone gifted the clone to you..are you sure it had roots yet?

 

[Phytoplankton]

For plants that size, 16 inches at full power is waaay to low!.