Looks like light stress I assume with the canoe an...

some rare phenotypes may want more but it still won't be a "boost" it'll simply be more proficient at metabolizing it pretty much at all a times... This isnt the answer, but it provides some idea of the comlpicated nature of assessing these things and why someone trying to deduce it at home simply is not going to be accurate https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8635921/ there are numerous moving parts... interrelated relationships between the nutes themselves etc etc... superficial guessing based on what you can see is simply lacking 90% of the information needed to make a proper decisions. Trial and error.. and don't lie to yourself. if oyu had an expensive product and it burns the shit out of a canonopy, it's probably the cause, lol (not specifically about your context this time but in general ... you have some mild damage that you should be able to adjust and fix)

Doesn't look like light damage.. it'd have to be one hell of a light from 35 inches to cause light damage, too. P or K related, i'd wager... using a "bloom booster" blindly? amping up p or k blindly doesn't do anythign by stress the plant if you were giving enough before. plants don't all of a sudden need a 25-50% boost to p or k or anything else for that matter at any point in their growth cycles. Studies show giving more than 50-70ppm of P or 200ppm of K does't results in any increased presence in the flower than a control group that was not amplified... law of conservation of mass tells you that the extra nutes didn't find their way to the flower or building extra flower by comparison. This is old anecdotes that were never properly tested but claimed to be true by people that didn't know any better. this is not something oyu can resolve with yuor eyes and a small garden. Absolute hubris to beleive such a thing unless you have microscope implants in your eyes and can properly isolate and measure while comparing to a control group to prove the hypothesis... never happened.