flushing question / help

Hi rit i have been growing 2 beast plants 6 weeks in flower i vegged for 3 months i am using promix hp and gh 3 part with koolbllom. My question is i have never flushed ever. I plan to flush before harvest atleast 10 days btw 10 week strain. My question is should i flush my plants while they are growing how would i do that why would i do that and does it really matter ? Just wondering for next time around Heres some pics

Flushing washes all excess nutes from the rootzone allows the plant some respite from all that bulk feeding, allows a nicer milder toke to the smoke,
to my blog: https://www.rollitup.org/blogs/blog32237-flush-baby-flush.html

I mean flushing during doing the grow not the final flush

If you don't see a problem then why flush during bloom? You're plants look awesome. Flushing except near the finish line is usually done only when you see a problem. I know some people flush when things are great but it's pointless unless during previous grows with the same strain you have determined it needs periodic flushes. Your plant will let you know when you are doing something wrong.

A Flush is a flush ....ask any Mississippi card player will say

Thanks guys the reason i was asking is because i had a white widow to the left of that and it yellowed 1 week some of the fan leaves so i uped the nutes and added a tiny bit of epsom salt and it stopped . Also that week i missed watering by 2 days had alot going on that week not sure what caused it