Flower discoloration issue

Chill out on the nutes for a bit, but don't go too crazy or you just end up with the opposite problem.. Look over history of how you fed this time and if you buy the same products next time, you can adjust what you do to avoid the clawing and overly lush leaves. How fast it progresed will inform about how much of a reaction you should have. faster it came on, the bigger the reaction in the opposite direction needed to correct it. if it slowly crept in over seveal weeks, it may only need a small adjustment early on. coloration of pistils is normal development. if it happens too early consider wind burn or pollination as a cuase and look into it.. wind purn would be localised damage in front of a fan and easy to elimintate other possibilities, if so. You'd find pollen sacs if you have a full garden pollinated.. solo nanners won't typically cause more than a handful of seed. didn't mean to scare... i don't think you are pollinated.. looks to me that they are simply plants aging as they should.

Way too much nitrogen from the looks of those super dark leaves. Thats going to create small leafy buds man.

You could keep feeding them until it gets worse or feed them freshwater for a few days until you see some yellowing but what you do need to know is that you can feed freshwater for 3-4 weeks before harvest without any issues and thats its unlikely that stopping the feed is going to effect them negatively.