Leaves turning yellow/white-ish color and falling off

ddeck96

Well-Known Member
Right after my plant stopped stretching, the leaves started to turn yellow, and then a pale white color, then they fall off, working its way up from the bottom it seems. The tips of the yellow leaves seem a little blackish brown, and some of the tips are curling up/down. I thought it might be nitrogen def, so I upped my nutes, but I’m not totally sure if it’s helping.
Ph is good, measured 6.3 this morning
Strain is LSD autoflower by fast buds (57 days old) in fox farm ocean forest/happy frog mix
Rh is pretty steady at 40-45
Temps fluctuate between 78-82 degrees (although it has gotten up to 84 on hot days)

Any ideas what it could be and how to correct it? A bit worried here. Thanks. Pics below. (Also it’s slightly more yellow than it appears in pic)
 

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