brown leaf tips

Any help please on what the problim is. I have feed no nutes.nutes already in soil. This on came up in the last 24 hours

Give some more Info on your grow and you will get help.
What lights?
How often water?
What type soil?
Any nutes added?

C'mon, we need more info than that.
But I'm leaning towards nute burn or a potassium deficiency.

Is it all on top & or bottom growth?
What nutes are you using?
What medium? Is there additional nutes in the medium?
Have you checked your PH?

Easy of the nutes, dry up a used banana skin & crumple it up over your medium before your next water.
On a side note - Get your hands on a bottle/box of cal-mag, I give all plants a small does in week three & six of veg regardless.

If you haven't added nutes yet, I'm guessing light burn. I just had a plant do this @ 30" below COBs.
More pics, one of the whole plant, and a lot more info is needed.

Thank guys its sorted it wasa little nute burn thanks ill do a pic soon