Help ... what's this on leaves

My autoflowering plant is going great but has this on one of the leaves .. Please help what does it mean

only on one leaf?? or are you seeing it on others??

if its only on one leaf, dont mind it. unless you really want to, check ph.

putang knows whats up... except I say to ALWAYS check pH. pH being off has got to be the most common reason we see issues.

Looks to me to be an early shade leaf dying off.....That's natural.

plant looks great tho

keep up the love and love will keep it up