brown/yellow tips

[JiGGabOo]

hey my plant is around a 1 week old and its been really healthy untill this point. today i found out that one of my plants have 1 leaf that has brown/yellow tips.(its at the very tip of the leaf) also, i didnt use any nutes yet and its growing in normal soil. Can it be the perlite causing it? i did 50% perlite and 50% topsoil. On the perlite bag it said it had plantfood in it though.
what is causing this? is it too much heat? overfert from perlite?

[JiGGabOo]

I think its from too much heat but i want to be sure. :stoned:

[JiGGabOo]

nooo its not insect problems...its not like theres a bite on it or holes, the tips of the leaf is just brown/yellow(on the pointy part of the leaf)

[Dazed4now]

could be the heat
a friend of mine has a few plants growing outside a few blocks away and they started to turn yellow at the tips and it gradually moved up until about 2 nodes worth of bottom leaves were gone, it was about 90F that day

[diche]

i got a tip like that and I accendentally over fed, so I would bet its that