Biobizz and Bloom
Biobizz on the left, Bloom on the right, matched on the job each bottle does. Their organic base, soil mixes and microbes stay put. Here’s where the two ranges meet, and where Bloom adds a job.
Last checked 5 November 2026 · Public information only
This Fit Report is a summary of publicly available information about Biobizz and its products, taken from their own website, labels and published material as of 5 November 2026. We’ve linked each source so you can check it yourself. Rates are as printed on each company’s own pages; we don’t show prices. It isn’t affiliated with, endorsed by or approved by Biobizz, and product names belong to their owners. Products, rates and claims change, so please confirm current details with the manufacturer before making any decision. Spotted something out of date? Email nathan@bloomyellowbottles.com and we’ll correct it.
Same shelf, different gaps.
Biobizz and Bloom both sell seaweed, fish and humic bottles, so a lot of this report is about running them side by side. The bits Biobizz’s product list doesn’t carry are silica, a sea-mineral trace input, a PK bottle, and single-stage bottles for mid veg, the flip and the finish.
- Stays as is: Bio·Grow, Bio·Bloom, the Mix soils, Worm·Humus, Microbes, Leaf·Coat and pH.
- Both have one: seaweed, fish, a root starter, humic and cal-mag. Test them next to each other.
- Not on their list: silica, sea minerals, PK, and Pre, Ultra and Final.
Biobizz and Bloom in short
Bio·Grow, Bio·Bloom, the Mix soils, Worm·Humus, Microbes, Leaf·Coat and pH.
Alg·A·Mic, Fish·Mix, Root·Juice, Top·Max and CalMag each sit near a Bloom bottle.
Silica, Sea Minerals, PK, and the Pre, Ultra and Final stage bottles.
Their line, Bloom’s fit at a glance
Matched on job, not NPK. Biobizz and Bloom both print rates in ml per litre, so the numbers line up more easily than most. Tap a tag to filter.
Keep the base you run. Bloom’s additives sit on top of it.
Their soils and dry blend stay. Bloom’s liquids go in the water.
Bloom has no microbial inoculant, so this one stays.
These run right through the Biobizz schedule. Nothing in Bloom’s range is built on aloe.
A leaf coating, not a feed. Bloom doesn’t make one.
Bloom doesn’t make pH adjusters, so yours stay.
Both are seaweed. Bloom’s is southern bull kelp. Run one, or test them side by side.
Both carry fish. Fish·Mix pairs it with sugar beet; Seafuel pairs tuna with kelp.
Both are early root bottles. Root·Juice is humic and seaweed; Roots is amino acids, B vitamins and fulvic acid.
Both carry humic acid. Top·Max runs through flower; Humate runs the whole cycle.
Both are calcium and magnesium. Pick one.
Potassium silicate, added first, plus trace minerals from sea water.
Labelled 0-19.5-21. A just-in-case bottle for peak bloom, stopped at the flush.
One additive for mid veg, one for the flip, one for the last two weeks.
Put it side by side
Where both ranges have a product for the same job, the fair answer is a test in your own room. Here’s what to watch and how to keep it fair.
Keeping it fair
- Same plants. Clones off the same mother, same cultivar, same age.
- Same room. Same light, climate, media, pot size and watering.
- Same base. Keep the base feed and EC the same on both sides.
- One change. Change only the product being tested, and write down what you see each week.
Why each one fits
What the Bloom product does, the research behind that kind of input, and where it sits in a program that already runs.
Silica and sea minerals
What it does. Silica is potassium silicate, labelled 0-0-4, at 0.33 ml/L weekly from veg through early flower, added to the water first. Sea Minerals is trace minerals from sea water at 0.13 ml/L weekly, veg to bloom.
A review of silicon in plants covers its build-up in cell walls and its links to drought, salt and pathogen tolerance. It’s general plant science and doesn’t test these bottles.
How it stacks. Silica goes in first, then the Biobizz feeds at their schedule rates. Small doses, so they shouldn’t push the mix around much (our read: check pH after silica).
A PK bottle for peak bloom
What it does. PK is labelled 0-19.5-21, at 1 ml/L. It sits at flower week 5 on Bloom’s chart, as an as-needed bottle depending on conditions, and stops at the flush.
A review of potassium covers its roles in enzyme activation, photosynthesis and stress tolerance. It doesn’t compare products or timing.
How it stacks. Bio·Bloom and Top·Max climb through flower on the Biobizz chart. PK would go in around week 5 only if the plants want it (our read: watch runoff EC).
One bottle per stage
What it does. Pre in mid veg (weeks 2–3), Ultra at the flip (flower weeks 1–2), Final for the last two weeks including the flush, alongside Ooze. 1 ml/L each, weekly. These are timing tools, so there’s no study cited for them here.
How it stacks. Biobizz’s schedule already sets every bottle week by week. These slot into the matching weeks on top of it (our read).
Kelp and fish, side by side
What it does. Seaweed is southern bull kelp at 1 ml/L weekly, seedling through flush. Seafuel is tuna and kelp at 1 ml/L weekly, clone through late flower.
Reviews of seaweed extracts report effects on growth and stress tolerance across many crops. Work on protein hydrolysates, which fish inputs belong to, links them to nutrient uptake, mostly under stress. None of it tests either brand.
Ali et al. (2021), Plants (review) · Malécange et al. (2023), Int J Mol Sci (review)
How it stacks. Alg·A·Mic and Fish·Mix already do this job in a Biobizz room. The clean way to compare is one bench each, same base feed (our read).
Where each bottle sits in the cycle
Biobizz’s timing in grey, Bloom’s in yellow, across shared stages of the grow.
| Stage | Root | Veg | Flip | 3–4 | 5+ | Last 2 | Flush |
|---|---|---|---|---|---|---|---|
| Biobizz, per their pages | |||||||
| Root·Juice | |||||||
| Bio·Grow or Fish·Mix | |||||||
| Bio·Bloom and Top·Max | |||||||
| Bio·Heaven and Acti·Vera | |||||||
| Alg·A·Mic (Light·Mix, Coco·Mix) | |||||||
| Microbes (once a week) | |||||||
| Leaf·Coat (spray) | |||||||
| Bloom, per Bloom’s weekly feed charts | |||||||
| Roots | |||||||
| Pre | |||||||
| Ultra | |||||||
| Phat (weeks 3 and 4) | |||||||
| Ooze (wk 5 to flush) | |||||||
| Final (with Ooze) | |||||||
| Seafuel | |||||||
| Seaweed · Humate · Sea Minerals | |||||||
| SWTNR | |||||||
| Cal-Mag | |||||||
| Groigen (foliar, as needed) | |||||||
| Florigen (foliar, as needed) | |||||||
| PK (as needed) | |||||||
| Silica | |||||||
Timing comes from the Biobizz nutrient schedule: propagation, veg, then flower weeks 1 to 8, week 9 plain water, week 10 harvest. Their bottles stop at week 8, so their bars end before the flush. Leaf·Coat is sprayed about twice a week until a fortnight before the end of flower, so it’s pale (our read). Bloom’s bars follow its weekly feed charts; pale Bloom bars are as-needed bottles.
Where the programs complement each other
Biobizz base, three extra jobs on top
Silica, Sea Minerals and PK aren’t on Biobizz’s product list. They go in at 0.13–1 ml/L over Bio·Grow and Bio·Bloom, with PK only as needed around flower week 5.
Seaweed, fish and humic, bench by bench
Five Biobizz bottles sit near a Bloom one. Both brands print ml per litre, so a grower can run one bench each on the same base and compare on even terms (our read).
Stage bottles in a week-by-week chart
Biobizz growers already dose by the week. Pre, Ultra and Final are 1 ml/L weekly and drop into mid veg, the flip and the last two weeks.
Already covered
- Base feed. Bio·Grow and Bio·Bloom, or Fish·Mix in growth.
- Soil and coco. All·Mix, Light·Mix, Coco·Mix, Worm·Humus and Pre·Mix.
- Boosters. Root·Juice, Alg·A·Mic, Top·Max, Bio·Heaven, Acti·Vera and CalMag.
- Root zone and pH. Microbes, Bio·Up and Bio·Down, plus Leaf·Coat for leaves.
Stays exactly as is
- Bio·Grow and Bio·Bloom. Bloom’s additives go in around them.
- The Mix soils and Worm·Humus. Bloom has no growing media.
- Microbes. Bloom has no microbial inoculant.
- Leaf·Coat, Bio·Up and Bio·Down. Nothing in Bloom’s range does these jobs.
Background, science and sources
Who Biobizz are
Biobizz makes organic plant nutrients, substrates and boosters. Its site says “Family-made since 1992”: founded in Groningen in the Netherlands, and based in the Basque Country, Spain, since 2015. It says it’s sold in more than 70 countries, and US growers can pick the United States from the site’s country menu. The pages we read don’t name a parent company.
The range is liquid grow and bloom feeds, a fish feed, a run of boosters (seaweed, humic and fulvic, amino acid, aloe vera, root), CalMag, a microbe blend, a latex leaf coating, pH regulators, soil and coco mixes, worm castings and a dry starter blend. Product pages list certifications including Ecocert and Control Union NOP Input, and the brand publishes a week-by-week nutrient schedule.
Sources: Home · Nutrient schedule
What each company brings
Biobizz: Organic liquid grow and bloom feeds, seaweed, fish, humic, amino and aloe boosters, a microbe blend, pH regulators, soil and coco mixes, and a printed week-by-week schedule.
Bloom: one additive for each stage of the crop, seaweed, humic and sea mineral inputs, foliar sprays, and weekly feed charts for soil, coco and hydro. Rates and timing are on every product page.
Cropping Solutions, the other brand under Agricultural Organics, isn’t part of this report.
Dose basis: how each side counts
Biobizz prints ml per litre of water (grams per litre for Microbes), set week by week on its nutrient schedule. Bloom prints ml per litre of nutrient solution on a weekly feed chart, so the units already match.
Biobizz’s weekly rate is what goes into the water that week; Bloom’s sits on a weekly chart. The analyses differ too, so the same ml on each side isn’t the same dose (our read).
Mix calculator
Rates as printed on each company’s page (1 US gallon is 3.785 L). Bloom’s rates are per litre of nutrient solution, dosed weekly per its feed charts. Pick a product and your tank size.
Humic substances and rootsWell supported
Canellas and colleagues (2015) review humic and fulvic acids as biostimulants in horticulture, linking them to changes in root structure and function tied to nutrient uptake, including more lateral roots.
Why it matters here: Root·Juice, Top·Max and Bio·Up all carry humic acid, and so does Bloom’s Humate. The review is general and doesn’t test either brand.
Sources, all viewed 5 November 2026
Biobizz: Home · Nutrient schedule · Bio·Grow · Bio·Bloom · Fish·Mix · Alg·A·Mic · Root·Juice · Top·Max · Bio·Heaven · Acti·Vera · CalMag (Biobizz) · Microbes · Leaf·Coat · Bio·Up · Worm·Humus · Pre·Mix · Nutrient schedule (PDF)
Bloom: Roots · Pre · Ultra · Phat · Ooze · Final · Seafuel · Seaweed · SWTNR · Humate · Cal-Mag · Groigen · Florigen · Sea Minerals · PK · Euro · Grow · Flower · Silica · OrganiShield
Last checked 5 November 2026. Public information only. Not affiliated with, endorsed by or approved by Biobizz; product names belong to their owners. Please confirm current details with the manufacturer. Corrections: nathan@bloomyellowbottles.com. All Fit Reports