Newbie plant problems - any advice greatly appreciated!

Hi I've got four plants in my closet and I switched the plant to flowering stage a little over 3 weeks ago. Prior to that they looked so healthy. Now they're starting to look unhealthy. 2 of them (critical hog & mama mia) are looking worse than the other two (og kush & white widow). Please take a look at the pictures and let me know what you think. My best guess is excess nutrient burn or possibly a phosphorous/boron deficiency? This is my second garden so I've still got more to learn. This garden is on the island of Saipan so it's very humid here which gives me other problems like worrying about mold or difficulty drying the babies when they are ready. But that is for another thread. Thanks for viewing and many thanks for any advice!

looks like nute burn over feeding, pics in reg light would help

yeah you did a healthy nute burn my dude! All is not lost, back off on whatever your feeding them and start off again going k.i.s.s simple with your feedings. These plants don't need to be hammered with nutes in some cases to flourish. Don't get me wrong some strains like sour diesel 7/8's sour ask you to front load nutes in early flower. Give it two weeks or so of nothing but balanced water. see what they do. just my opinion im not expert.

Ya you burn'd them.

To help prevent mold. Fan is a must in high humidity. Make sure you have one going for your grow and when drying.

dunno what kind of supplies you can get on saipan but look into a product called damp-rid. it's in a little bucket and it pretty much kills humidity.

I agree, def looks like nute burn, back off on your nutes, also next time take pics in natural lighting, it helps alot to diagnose.

I'm not one to use the word "flush" as 99% of the time it's not necessary or useful. But in this case, I would do a quick flush and wait a few weeks and then give about 1/2 of whatever you're feeding with now....then wait awhile.