whats the problem when leafs turn this color brown?

[invincipal]

how to cure the problem, it's only one leaf(don't want it to be more), i started flowering about 5 days ago. changed the soil to new soil about 8 days ago(w/ soil that already had flower food in it and i also put some bat guano in).

 

[NoDrama]

looks like you spilled something on it.

 

[invincipal]

if anything, i did spray some water on it when i watered the plant.

 

[bonz]

could be ph imballance. do you know your ph

 

[bleezyg420]

nute burn, your ph is off.

 

[invincipal]

alright, well i cut off a few bad leafs, here's the leaf again...but i'll change the soil.....alittle more fertilizer would be good, right? flowering...

 

[NoDrama]

If it was nuted soil (Miracle Grow?) its probably nutrient burn, too many nutrients.

 

[bleezyg420]

alright, well i cut off a few bad leafs, here's the leaf again...but i'll change the soil.....alittle more fertilizer would be good, right? flowering...

to much, do not use any nutes or ferts. staight 7.0 grow medium. Plain ph balanced water.