more doesnt necessarily mean better. i havent used a bloom booster in a few years (last one i used was pk 13/14). it seemed to stress the plant, sure maybe it bulked up, but i think the stress stunts growth where if you just have everything dialed perfectly with a nice base nutrient the plant will do just as good. best thing to do outside if you want a p boost is just add a tablespoon or so at the base of the plant of some indonesian guano. but in my experience outdoor plants do great with just hose water. you dont need crazy levels of nutrients to achieve success. all thats going to do is degrade the quality of your final product and waste more money out of your pocket. just my opinion.
example; ive been soil growing for years and had it so dialed in that i could run a whole cycle of veg and flower for under $40 dollars. water only, no bottled anything, just tap water and some soil amendments mixed in beforehand. (i did use liquid karma because i got a huge bottle for basically free and it is good stuff, nothing wrong with a litlte molasses or sucanat to feed the microbes either every once in a while).
now i'm experimenting with deep water culture. i decided to run dutch master nutrients. going against what i read online from people using it (which was just use A+B and some calmag maybe w/ RO water) i decided to use the whole line (silica, add.27, liquid light and saturator). granted i got a nice 50% off discount, it still cost me a lot more money that it should because now that im on my second round and ive worked out a lot of the initial problems, I'm only using A+B and calmag. and things are growing much much better. i did not see any added benefit to using the expensive add 27 (in fact im just going to use liquid karma since i have the big bottle, basically the same thing, probably better). i spent money on zone and uc roots (expensive) trying to keep a sterile root enviroment when what i read said to use a cheap beneficial compost tea consisting of simply alaska humus brewed for 48 hours. i ended up dropping the zone and UC roots because i got slimed and fell back to the basics (tea), which roots grow so much better now.
point being is keep things simple. bottled nutrient companies want to sell you stuff you dont need, whether it be an additive that is the 'missing link' or the 'next best thing' 'guaranteed to increase uptake and improve yields' or concentrated crap because everyone in cannabis growing thinks more is better as far as what you are giving the plant. when in reality the exact opposite is true. as long as you have your fundamental bases covered (macro nutrients in a regular dose, using a simple jamacian/indonesian guano in flower is perfect, mexican guano in veg if you wanted, but usually the base soil has enough to carry through veg just fine.) and micro nutrients (azomite powder is super cheap and is the best additive you can give to add ALL micronutrients), just let the plant do what it wants to do. it'll thank you by rewarding you. so will your pockets. just my opinion.