Late flower burnt sugar leaf tips

Is it normal for the sugar leaves to get burnt tips towards the end? I’ve only been giving plain water the past two feedings. Was thinking of harvesting this weekend.

I’m noticing more white pistils today though. Maybe give some dry koolbloom today to help ripen the buds? Then one more water only before harvest?

Any thoughts?

Some trichome shots. Mostly cloudy I think. There’s a few amber here and there