Tips and edges turning black

[Woblaaaah]

Plant looks healthy just starting to get black sugar leaves towards the end of flowering id say about a month to also all the piston things are a purply pink colour strain is bc tuna god growrn outdoors. Anyone had this before or know what it means.

 

[Pbass]

Prolly just the strain, that doesn't look black as much as fall purple to me. I do get crusty edges from time to time on random plants but that looks natural. CHeers, gl!

 

[Canadadoes]

I agree, looks more purple to me. Variance in temperature can really bring out the colours. I like it!