End of flowering question...dead leaves!!!

i have 20 sativas just about 10 weeks into floower some on drippers in rockwool on tubes....and some in a home made flood and drain.. and there fan leaves are like getting crispy and yellow and like dying kind of...is this normal or the end period of flower??? like not all of them but theres quite a bit and i read somehwere that this does happen and ive seen quite a few pictures on here of late budding plants that look like the fans are dying off and stuff...the buds are still filling out...some way more than others but the trichs are not amber...i seen a couple ambers but nothing that indicates that i want to pull...im going for like %60 amber or so...any information would be greatly appreciated!!!

Usually it because there transfering all the nutes to the budsites and the fan leaves are no longer important, otherwise check for mites, if none, your good

PS to check for mites get a sheet of printer paper and hold it under the fan leaves, shake them a bit and if you knowtice lil black dots moving on the paper you got mites...if not then its all good, dont worry.

Yes,

This is normal.

Sounds like you got a handle on it. Amber trichs will get you that good body stone.
I start flushing hydro first sigh of amber trichs. When they are all milky actually.

Then when I cut I see some amber.

Enjoy.

ya i was worried my 1st hydro grow mannnn the buds were tastey

thanks dudes i feel alot better now....i read somewhere it was normal...but theres always so many things that contradict on the net....