weed cure

In the photos as u can see the pistils tips are turning brown is this normal or should I change something in the nutes or lights ? Please help

Witch do you guys think is better for drying process a dry rack or hanging them upside down

I just finished my dry and I decided to Cure buds with a Boveta pack.. How long should I cure? .. I'll leave some pictures for those who are curious.

Ok so my baby has been in flower for 20 days now and its leaves has been yellowing and brown spots are on it also they are falling off! Can some one plaese tell me whats the problem because most of the leaves has fell off already.