White stuffs on the buds

When you grow dense buds you need to keep your humidity down around the 35, no more than 40. Dense bud is much easier to rot and needs that lower humidity. I have never had a problem of my big dense buds rotting indoors at 35rh , but outdoors is a different story. Impossible to control., you have to keep a real good eye on them and remove rot when you see it starting.

You can harvest and you can cut the effected parts off before spreading to the entire plant, this can’t happen over night, check your plants and buds make sure your growing space is well ventilated