6 weeks flowering stage update, pics included

hi sorry not been on for a while but these are my plants as of 30mins ago,
i did have 12 but due to half being males i have had to kill them, gutted.
anyways 2 of these plants which have all been feed the same way have started looking like they are burned ive tried all sorts anyone got any suggestions on why?????

please comment on how they look

a few questions tho if you can answer lol
1, will the buds get any bigger?
2, also been told you can put the light from 12/12 to 10/14 in the last 2 weeks is this true?
3, how long will these take to dry?
4, how many times should i flush them before harvest?

anyways thanks for reading please leave comments thanks

How do you use that toilet when it is mounted on the wall like that?

haha funny its jst the way the pics taken lol shuda rotated them lol, i had jst flushed them all lol

1. they will get a little bit bigger but not too much.
2. wont hurt but really doesnt matter much
3. every plant is different you just gotta keep checkin on em.
4. flush em for about 2 weeks before harvest and stop watering about a week before harvest. (will help shorten drying time)