leaf tip turned white

i bought some little clones from the club the other day and im a bit confused on this one. a leaf on one of the clones has a white spot on a leaf like a bird took a shit on it or a white birthmark or something. any one have any ideas what this could be?

i was sweating pretty bad when i was planting the rockwool cubes into the growing containers and could it be that my sweat off my forehead did this?

never seen that before...only thing white I can think of would be powdery mildew....pics would help lots...

Did it look like this?

what is that spliff??

This happened when my plants were about 2 weeks old. Only happened once and only on this leaf. The white patch was bone dry crispy and bright white almost like it was bleached.

I think it was from misting the plant while it was in the sun.

yours looks kinda like paint. mine looks like bird shit...probly the same damn thing. i'll post pics tomorrow.

it is paint, and it is bird shit.
lol alright for white spots in the shape of bird shit, try not misting it (if you were, is it "inside" the leaves?or can you rub it off with some water.

im high but well be getting somwhere

well, this is the white tipped bird shit shapped white patch that is on one of my clones. the tip is starting to turn brown.

Terrible pic man, is there any way you can refocus the camera so we can help?

Just looks like spillage from watering to me whilst under the lights from that pic though its hard to tell

Sounds like nutrient burn..... just giving the plant too much nuit's, give it 2/3 feeds with just water and then go back to giveing it the correct amont for its size.. if they are small dont give it the nuit dosage it says on the bottle give it about half cos it will be like giveing a baby sterroids lol...