Indoor Flowering Week 5

Hello all, Ill start by describing my grow!- I'm working with a 12x6 room with 2 air cooled 1000w HPS hoods. I have 14 plants I did not top, lollipop, supercrop, SOG, any of that, Trees all the way (8x-THC Bomb, 2x-Pineapple Express, 2x-Blueberry Gum, 1x Blue Cheese, 1x LSD) currently in the middle of their 5th week of flowering, all in their own 5 gallon pot with roughly 40%cocoa/ 30%Happy Frog/ 30%perilite. I generally water them a gallon each plant every three days. I also feed each of them 1 Tbsp of Tiger Bloom by fox farms every other watering. That's the gist of it. I have learned i should probably run similar or the same strain because of their different needs/preferences. Though as I'm approaching my 6th week of flowering with this diverse little jungle, my pineapple express plants are seeming to be far more developed than these other strains.

So a few questions i have for the MG community would include: Is it possible that i will need to harvest certain plants before others with these diverse strains? How should i approach my last few weeks of flowering from a nutrients standpoint? (ive heard no nitrogen, flushing them, night before chop, etc) Of course all advice/pointers/comments are helpful and appreciated! Thanks all!

Different plants, different finishing times. Some feed till the end. I prefer plain tap for last week in flower. I pour about 3 gallons of water through a 2 gal pot for flush. Then the plain water till harvest.
It looks like you cleaned the inside of the plants somewhat. you could try a multiple harvest as well. Just take the fattest top colas and let that lower growth fill out a bit.