Since you asked "should i feed or not"
do you have any major toxicities?
if not, do not flush. you flush due to a problem, not some mystical anecdotal nonsense tht ppl perpetuated for decades while never testing it properly...
flushingn at end of harvest will only have a negative impact on a healthy plant... it does not change the mineral content of buds, because .. cell differentiation, LOL. Mineral storage is not a function of a sex organ. Do human that eat too much chocolate start to have hair or skin partly comprised of chocolate? no, that's absurd. The skin performs a function and it isn't storage of fat and such. that is adipose tissue's job.... or leaves in a plant
regardless if you feel the need, it won't damage the plant too much... it'll cannibalize its leaves for growth... or simply slow it down for no reason... but over the course of a few days vs all the days in bloom, it's a small percentage.