leaves develoted black spots in 3 hours

im trying to attach photos. i have an outdoor in its 3rd month of veg. i checked the leaves yesterday when i got home and three hours later they had developed black dots on the tips and three hours after that they started to wilt. four days ago i moved it to an even bigger pot, adding a nutrient mix and blood meal. the darkening is only in the bottom 6 branches and is worse the closer it is down. i heard this may be a phosperous def. because it looks like a fungis. i had thought somthing like that would take longer to develop than in a afternoon.
thx.

 

Hey, uh...damn...ummm...

Oh yeah! How long are your days right now? If it's on it's third month of veg then it must be starting flower phase pretty soon. If it is, then I'd go with phos def. because the plant are needing those additional nutrients to stimulate bud growth...

 

the next day the leaf tips turned gold now there wilted and crispy. the symptims are slowley moving up the plant. i figured when i transplanted i might of over fertalized so i flushed the plant with water on saterday and hopfuly some color will start to come back in the next couple.