First off, like Botanicare (only good thing I know in AZ, plus them respecting out of state cannabis cardholders in AZ), LOVE Fulvex and some of their other omri listed funny named products. Like PBP, used it for years in ebb and flow before moving on down the path...
They know whats up with NPK, note that ALL their PBP formulas are K dominant, P is VERY overrated for indoor, container/hydro gardens.
1 thing to note. This stuff is organic and natural like the label says except 1 ingredient: Potassium Carbonate
This ingredient is created by bubbling CO2 gas through a vat containing KOH. This process is neither natural nor organic, for us
picky ones.
I used it in hydro for years (with 180ppm pH 6.8 well water) then in soil (with RO and GOs organic calmag) sparingly to get rid of left overs/ free samples (they are kinda generous if you talk to the right person there/at your local shop). One thing I didn't follow directions on was the formulations:
I preferred to use the soil bloom formula (even in hydro). If you have both switch to soil formula after the bloom stretch is over. IMO 1-4-5 is a better NPK for the rest of bloom.
Once in my hydro days I ran out of veg formula, yet had a big jug left of 2-3-5 hydro bloom left (wasn't using near as much anymore b/c above point about using soil formula even in 'dro) So I just used it for all my veg and mom reservoirs and it worked nearly identical to the 3-2-4 veg stuff; same growth rates(fans bigger than hands in 3 weeks 400MH with Krystal Spike), tight nodes, perfect color of green, etc. Not saying to buy hydro bloom instead of veg PBP but it was just interesting, plants take what they need as long as its available for absorption I guess.
The rest of the story is I just stopped buying the hydro formula all together (it used to be a lot better anyways before they lowered the doses of humic and other ingredients and the color went from blacker to more amber). During the first weeks of 12/12 I recommend just phasing out your veg into bloom and ending up 100% soil bloom 1-4-5 right when they are done stretching. I used 25% increments ie; 1st res in 12/12=75%veg25%soilbloom, next change=50%veg50%soilbloom, next=75%veg25%soilbloom, stretch over=100%soilbloom hit em with
KP boost (as K is more important than P indoors and in containers.) Then bell curve the dosage of your nute so it comes down towards flush.
elija.wattson
The essential elements of Pure Blend Pro nutrients dont come from industrial chemicals like urea and ammonium nitrate, and eliminate the harmful heavy metals, like arsenic, mercury, and selenium that often contaminate commercial chemical fertilizers.
Don't get too cozy with the idea of your 'super pure' PBP. The main ingredient is fish meal. Due to issues of bioaccumulation, and largely depending on the trophic level of the fish used, there could still be MANY heavy metals and other compounds in the PBP. Mainly just because the industrial chemicals/wastes are being spewed into the oceans and waterways all day every day. They don't even stop for earth day

Also the next main ingredients (guano, and kelp) may be subject to bioaccumulation of nasty stuff we don't want in our gardens. Is the seabird guano still organic if the birds eat at the dump all day, then fly back to their island and poop? Sure its organic matter but its not welcome in my medicine's feeding schedule. Remember plants are great at phytoremediation - absorbing all kinds of compounds into their cellular structures.
Jack Larson
Who turned this thread in to a Dipshit contest ? how and why make something so easy sound so complicated ? Its not making anyone look smart. BTW for those that have forgotten this thread is about Botanicare Pro Bloom
LMOA. Agreed about staying on topic, BUT sometimes these stoner tangents can produce some amazing new connections, and sometimes its like listening to kids on the playground. That is why its nice to hear things from experience, as well as back up claims with references. Dunno if taking sides at the end will help anything chill out tho. Anyways hope my input helps some people. PBP is great if you are into bottles and not real strict with your definition of organic (because its organic and natural plus Kcarbonate), it grows nice yielding very high quality nugs for sure!