this is why a lot of good folks dont come around here anymore.. the misinformation spread by rookies is incredible.
like i stated in my first post. your problem is you have made a mess of your medium. your ph and ec is out of wack, and your plants arent growing because of it. they will sit there and do nothing for a few weeks, then start to ripen and finish their cycle.
if you want to try and get her back on track, then u need to flush with a mild nutrient solution at 5.7ph. if your in a 3 gallon pot then u need to put 9 gallons of water through each pot.. then check your runoff and see where the medium is at. if its not right, guess what, more water.
your not allowing enough runoff for your feeds with coco. coco needs a shit ton of runoff unless ur doing weekly flushes. 25-35% runoff is completely normal for coco and you want to do really heavy feeds to flush out salts.
your plants might not be showing a deficiency, but that doesnt matter. they dont have to initially. they will eventually though if you dont act now. and honestly i think its far worse for the plant to just sit there and not do anything rather then show some deficiencies so u know something is up, make the proper adjustment and move on.
this is why u should be doing runoff checks with every watering. your runoff is everything, and tells u how u should be watering. ESPECIALLY WITH COCO.
your plant will take at least a week to start growing again, and it wont yield much at all by the time its done. you cant just "add more time" to a plant and expect it to finish like a plant that wasnt fucked up and stressed. it doesnt work like that. u can give it another week or two extra but its not going to be anywhere near what a healthy happy plant would have been.
cutting out the bloom nutes is one of the worst suggestions ive heard. that is almost the exact opposite of what u would want to do. u want to cut the bloom boosters, and give them a light feed as a flush. then u need to recharge the medium after its flushed because of cocos CEC.
its pretty easy to post problems online and get overwhelmed with all the suggestions that will just steer you in a completely wrong way. especially when its a bunch of growers who have only been doin this a couple years pulling advise out of their asses.
just my .02.. ill leave you guys to it.