Impello Biosciences and Bloom
Impello makes microbes and biologicals; Bloom makes tonics and stage additives. A couple of bottles do similar jobs. Most don’t. Here’s the line-up.
Last checked 5 November 2026 · Public information only
This Fit Report is a summary of publicly available information about Impello Biosciences 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 Impello Biosciences, 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 Spotted something out of date?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.
Bacillus in the root zone, kelp and humic in the tank.
Impello’s range is led by Tribus and Continuum, both Bacillus inoculants, with Dune (silicon), Lumina (amino acids), Tundra (a PK bloom feed) and Consequence (chitosan). Bloom has no inoculant. Bloom’s weekly kelp, humic, sea mineral and stage bottles sit next to Impello’s microbes. Silicon and PK are where both ranges have a bottle.
- Stays as is: Tribus, Continuum and Consequence. Bloom makes nothing that does those jobs.
- Both have one: silicon (Dune and Silica), PK (Tundra and PK), and a protein input (Lumina and Seafuel).
- Not on their list: a base feed, cal-mag, humic, sea minerals, stage additives and foliar sprays.
Their line, Bloom’s fit at a glance
Matched on job, not NPK. Impello prints rates per US gallon; Bloom prints ml per litre on a weekly feed chart. Tap a tag to filter.
Impello’s core job. Nothing in Bloom’s range overlaps it.
Another inoculant. Stays on Impello’s schedule.
Their label targets fungi, bacteria and nematodes. Bloom’s OrganiShield targets insects and mites. Different jobs.
Both are silicon and both say add first. Pick one.
Both are PK. Tundra runs through flower; Bloom’s PK is an as-needed bottle at peak bloom. Plan the stack, or pick one.
Both bring a marine protein input. Lumina is shrimp; Seafuel is tuna and kelp.
Impello’s products go on top of a base. Bloom has two-part options.
Calcium and magnesium with iron and zinc, grow and bloom.
10% humic acid and southern bull kelp, seedling through flush. Tundra carries a little of both as additives.
Trace minerals from sea water, a small dose.
One additive for mid veg, one for the flip, one for the last two weeks.
Foliar sprays applied every few days as needed, outside the feed line.
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.
Humic acid with the Bacillus
What it does. Humate is 10% humic acid at 2.5 ml/L weekly, from seedling through the flush.
A 2021 review looks at humic substances paired with plant growth-promoting bacteria, Bacillus included. Several studies saw more growth or nutrient uptake from the pair; a few saw no gain. None test Tribus, Continuum or Humate.
How it stacks. Tribus mixes into irrigation water or a nutrient reservoir with conventional or organic feeds, per Impello’s page. Humate goes in the same weekly feed. Our read: check Impello’s compatibility chart before tank-mixing.
Kelp and sea minerals
What it does. Seaweed is southern bull kelp at 1 ml/L weekly, seedling through the flush. Sea Minerals is trace minerals from sea water at 0.13 ml/L weekly, veg to bloom.
A 2021 review of seaweed extracts reports effects on root growth, nutrient uptake, flowering and stress tolerance across many crops. It doesn’t test these bottles.
How it stacks. Tundra carries kelp as a small additive from bud set. Seaweed runs the full cycle at a set weekly rate, so the two can sit together (our read).
Cal-Mag and the stage bottles
What it does. Cal-Mag at 1 ml/L weekly through grow and bloom. Pre in mid veg, Ultra at the flip, Final for the last two weeks alongside Ooze, 1 ml/L each weekly. These are feed and timing tools, so there’s no study cited here.
How it stacks. Impello’s line is built around biology and crop protection, with Tundra as its one feed. A base, Cal-Mag and the stage bottles fill in the nutrient plan around it (our read).
Where the programs complement each other
Impello’s biology, Bloom’s tonics
Tribus and Continuum go in at 0.5–1 mL/gal. Humate, Seaweed and Sea Minerals go in at 0.13–2.5 ml/L weekly. No bottle does the other’s job, so a grower can run both (our read).
A research-minded partner
Impello lists Fort Collins, Colorado, runs bench and field trials, and works with Colorado State University’s Horticulture Center. A Bloom-plus-Tribus program fits that kind of trial work (our read).
Silicon and PK, side by side
Dune and Silica both go in first; Tundra and PK are both late-flower PK. Fair tests in a grower’s room settle which one stays (our read).
Where each bottle sits in the cycle
Impello Biosciences’s timing in grey, Bloom’s in yellow, across shared stages of the grow.
| Stage | Root | Veg | Flip | 3–4 | 5+ | Last 2 | Flush |
|---|---|---|---|---|---|---|---|
| Impello Biosciences, per their pages | |||||||
| Tribus | |||||||
| Continuum | |||||||
| Lumina (early growth) | |||||||
| Tundra | |||||||
| 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 from each Impello product page. Tribus runs from first roots to harvest day. Continuum runs from propagation into early flower. Lumina’s page says early growth and routine weekly use, so later weeks are pale (our read). Tundra starts at bud or fruit set and runs through maturation. Dune and Consequence pages give no stage window, so they’re left off. Bloom’s bars follow its weekly feed charts; pale Bloom bars are as-needed bottles.
Already covered
- Microbes. Tribus and Continuum, both Bacillus inoculants.
- Silicon. Dune, a stabilised silicon liquid.
- Bloom feed. Tundra, 0-7-8, from bud set.
- Crop protection. Consequence, a chitosan biopesticide.
Stays exactly as is
- Tribus and Continuum. Bloom has no inoculant.
- Consequence. Disease and nematode control stays on Impello’s label.
- Dune, Tundra and Lumina. If they’re working, keep them, or test Bloom’s next to them.
Background, science and sources
Who Impello Biosciences are
Impello Biosciences is based in Fort Collins, Colorado. Its site says it was founded by a grower and runs research on the bench and in the field, with Colorado State University’s Horticulture Center as an academic partner.
The range is Tribus and Continuum (Bacillus inoculants), Dune (silicon), Lumina (amino acid fertilizer), Tundra (a hybrid PK fertilizer for fruit and flower) and Consequence (a chitosan biopesticide), plus Bootstrap for turf and ornamentals and Quench, which is on a waitlist. Their trials cover peppers, lettuce, hydroponic greens, citrus, grapes and turf. They sell to commercial farms, through distributors and online.
Sources: Home · All products
What each company brings
Impello Biosciences: Bacillus inoculants for soil, coco, rockwool and hydro, a silicon liquid, an amino acid fertilizer, a PK bloom feed, a chitosan biopesticide, and field trial work across row and specialty crops.
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
Impello prints rates per US gallon. At 3.785 L to the gallon, Tribus at 1 mL/gal is about 0.26 ml/L, Dune at 0.5 mL/gal is about 0.13 ml/L, and Tundra and Lumina at 5–10 mL/gal are about 1.3–2.6 ml/L. Bloom’s Silica is 0.33 ml/L, PK and Seafuel 1 ml/L.
Impello’s rates run from once a week to every watering, depending on the product. Bloom’s sit on a weekly chart. The analyses differ too, so bottle volume on its own isn’t a like-for-like dose.
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.
Bacillus as a plant growth promoterWell supported
Tsotetsi and colleagues (2022) review Bacillus species in agriculture: nutrient uptake, protection against pathogens, and tolerance to drought, salinity and heavy metals. They note the mechanisms are still not well understood.
Why it matters here: Tribus and Continuum are Bacillus products and Bloom has no inoculant, so this is Impello’s ground. The review doesn’t test either company’s products.
Silicon and plant stressWell supported
Luyckx and colleagues (2017) review how silicon eases abiotic stresses such as salt, drought and heavy metals, and its role against fungal infection and pests.
Why it matters here: Dune and Bloom’s Silica are both silicon inputs. The paper is general plant science and doesn’t compare products.
Sources, all viewed 5 November 2026
Last checked 5 November 2026. Public information only. Not affiliated with, endorsed by or approved by Impello Biosciences; product names belong to their owners. Please confirm current details with the manufacturer. Corrections: nathan@bloomyellowbottles.com. All Fit Reports