crispy edges..curling...

Im in week 4 flower and one of my plants which is getting the same treatment as all the others is messing with my head, at first i thought it was the heat but none of my other plants are being effected. The edges are crispy and the tips are crispy and curling up but i have other leaves that are curling down, im completely lost now, at first i was thinking it was nute burn but im using organic foxfarm nutes and the regular dosage. anyone have any sort of idea?

its weird though cause the plants are still budding nicely but the leaves are starting to look shittier, i notice alot of white residue in the run off tray, possible salt build up?

check the roots. maybe root rot

are all ur plants the same strain?

how many weeks flowering should they have?

if ur 4 weeks into flowering and the strain is a 6 week strain then its normal for the leaves to die off near the end.

if not then i would just try feeding that one plant with problems with water for a couple of feeds to see how she goes.

no, its a diff strain thats probably the reason
today it looked a lil worse and i ended up flushing it
so im gonna have a look at it tomorrow, its still buding
buds look nice, and the leaves are getting frosted
regardless of the curling withered leaves
its the one plant i had to tie down cause it was so large
so im hoping it makes it out allright.

you say possible salt build up? Sounds like nute lockout to me. Check your soil ph. If way off it could've cause nute lockout and when giving even more nutes you create a poison so to say that does this. I had it happen to me last grow. Puts some pics up though.