Phosphorus deficiency!? should i feed close to harvest?

Im pretty sure its days away from harvest! paradise seeds cheese. milky trichs with amber just starting. the buds look like they are about to get chunky so i think im days away from harvest. i dont know if i should feed it so close to harvest. i havent fed it anything in flowering yet as my soil is as rich as it gets.

I have some water soluble jacks classic bloom fert, also have phosphoric acid if its better to feed it just phosphorus?

I'd give a light dose then chop in bout a wk. Never know may just fatten up a lil more. jmo
Id go with the bloom ferts, theyre probably lacking a fe other things too