Grow More and Bloom
Grow More is a big mineral and specialty catalogue built for farms, turf and hobby growers. Bloom is a weekly program in bottles. Here’s how they line up.
Last checked 5 November 2026 · Public information only
This Fit Report is a summary of publicly available information about Grow More 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 Grow More, 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 Spotted something out of date?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.
A deep catalogue of salts, and a program to run on top.
Grow More’s US range is mostly the building blocks: water-soluble NPK powders, crop-specific hydroponic formulas, nitrate and chelated micronutrients, adjuvants and water treatments, plus a humic, a seaweed and a silicon product. What’s not on their list is a stage-by-stage additive program. That’s the weekly Bloom chart, going into the same tank as their base.
- Stays as is: the water-soluble and hydroponic bases, chelates, nitrates, adjuvants and water treatments.
- Both have one: seaweed, humic acid, calcium, silicon, a PK powder and a rooting input.
- Not on their list: stage additives, fish, a carbohydrate input and veg and flip foliars.
Grow More and Bloom in short
Water-soluble and hydro bases, chelates, nitrates, adjuvants, water treatments and Myco-Grow.
Seaweed Extract, Humic Acid, Foliar Cal and Mag-Nite, Silo-Tec, PK powders and Grow Roots.
Pre, Ultra, Phat, Ooze and Final, Seafuel, SWTNR, and the Groigen and Florigen foliars.
Where the programs complement each other
Their salts, Bloom’s weekly program
Grow More’s US list is base powders, hydroponic formulas and correction products. Pre to Final, Seafuel and SWTNR go into the same tank by week without changing that base.
Same tank, different jobs
Their crop-specific hydro formulas are built for lettuce, tomatoes and the like. Bloom’s bottles work in recirculating or run-to-waste systems, so a hydro grower can keep the formula and add the stage bottles (our read).
Overlaps worth a fair test
Seaweed Extract, Humic Acid, Foliar Cal and Silo-Tec each sit near a Bloom bottle. Pick one per job, or split the room with the base held the same.
Their line, Bloom’s fit at a glance
Matched on job, not NPK. Grow More’s labels mostly print rates per acre or per gallon; Bloom prints ml per litre on a weekly chart. Tap a tag to filter.
Keep the powder base. Bloom’s liquid additives sit on top of it.
Crop-specific bases stay. Bloom’s weekly bottles add to them.
Single-element correction is their lane. Bloom’s Sea Minerals is a broad trace input, not a chelate.
Bloom makes no surfactants, acidifiers or line cleaners, so these stay.
Both are kelp. Theirs is Norwegian kelp on a 3–4 week spray rhythm; Bloom’s is southern bull kelp in the weekly feed.
Both are liquid humic. Theirs is 12% on a per-season ag label; Humate is 10% on a weekly chart.
Both bring calcium and magnesium. Theirs come as separate nitrates; Bloom’s is one bottle with iron and zinc.
Both bring silicon. Pick one for the tank, or test them side by side.
Both are PK. Theirs are dry powders; Bloom’s PK is an as-needed liquid. Plan the stack, or pick one.
All three are used at the root. Myco-Grow is biology, so it stays; Roots carries on in the weekly feed.
One bottle for each stage, mid veg to the flush, on top of any base.
Tuna and kelp through late flower, and carbohydrates with potassium from veg week 2.
Veg and flip sprays, every few days as needed, outside the feed line.
Where each bottle sits in the cycle
Grow More’s timing in grey, Bloom’s in yellow, across shared stages of the grow.
| Stage | Root | Veg | Flip | 3–4 | 5+ | Last 2 | Flush |
|---|---|---|---|---|---|---|---|
| Grow More, per their pages | |||||||
| Water-soluble or hydro base | |||||||
| Grow Roots · Myco-Grow | |||||||
| Seaweed Extract (Grow More) | |||||||
| Humic Acid | |||||||
| Foliar Cal · Mag-Nite | |||||||
| 0-50-30 · 0-37-37 | |||||||
| 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 | |||||||
Grow More’s labels are written for field crops, turf and greenhouses, not crop weeks, so every bar here is our read. Myco-Grow and Grow Roots go in at cuttings and transplant. Seaweed Extract runs every 3–4 weeks as a spray (every 2–3 weeks for vegetables) and Humic Acid 3–4 times a season, so both are pale. PK powder timing is our read. Bloom’s bars follow its weekly feed charts; pale Bloom bars are as-needed bottles.
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.
A weekly program on their base
What it does. Pre in mid veg, Ultra at the flip, Phat for flower weeks 3 and 4, Ooze from week 5 through the final flush, and Final for the last two weeks alongside Ooze. These are timing tools, so there’s no study cited for them here.
How it stacks. A grower running 20-20-20 or a hydroponic formula keeps that as the base. These go in on top, by week, without changing the base recipe (our read: check runoff EC when you add anything).
Seafuel and SWTNR in the tank
What it does. Seafuel is tuna and kelp at 1 ml/L weekly, clone through late flower, tapering at the flush. SWTNR is carbohydrates and potassium at 1 ml/L weekly, veg week 2 to the flush.
Fish inputs sit in the protein hydrolysate family. A 2023 review links that family to nutrient uptake, mostly under stress, and flags plenty still unknown. It doesn’t test Seafuel.
How it stacks. Grow More’s Fuego and Bio-Cozyme pages say not available in the US market, so there’s no US-listed equivalent on their side. These add to a mineral base (our read).
Two kelps, two humics
What it does. Seaweed is southern bull kelp at 1 ml/L weekly, seedling through flush. Humate is 10% humic acid at 2.5 ml/L weekly, seedling through flush.
Reviews link seaweed extracts to growth and stress tolerance across many crops, and humic substances to root growth and nutrient uptake. Neither tests these products.
Ali et al. (2021), Plants (review) · Canellas et al. (2015), Scientia Horticulturae (review)
How it stacks. Grow More’s Seaweed Extract label gives a hydro rate at reservoir changes and a 3–4 week foliar rhythm. Our read: run one kelp in the tank and keep any spray on its own day.
Foliar feeds for veg and the flip
What it does. Groigen for seedling through veg, Florigen for the stretch to early bloom, stopping once buds set. Both at 20 ml/L, lights off, every few days as needed.
A mini review says leaf uptake of nutrients works but varies, and how nutrients cross the leaf surface isn’t fully understood.
How it stacks. Grow More sells spreaders like EZ Wet SA for spray tanks. Our read: jar test any mix before spraying, as their own labels advise for new combinations.
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.
Already covered
- Base feed. Water-soluble NPK powders and crop-specific hydroponic formulas.
- Micronutrient correction. EDTA and EDDHA chelates, Citra Grow, and metal nitrates.
- Spray and water tools. Adjuvants, surfactants, acidifiers and line cleaners.
- Specialty. Humic Acid, Seaweed Extract, Silo-Tec, Myco-Grow and rooting products.
Stays exactly as is
- Their base powders and hydro formulas. Bloom’s additives go in around them.
- Chelates and nitrates. Single-element correction stays with Grow More.
- Adjuvants and water treatments. Bloom doesn’t make these.
- Myco-Grow. Bloom has no microbial inoculant.
Background, science and sources
Who Grow More are
Grow More, Inc. sells fertilizers and specialty inputs for markets worldwide. Their homepage gives “applied research” as their motto since 1918. The pages we read don’t state an address or a parent company.
The range covers water-soluble NPK powders, Nutra Zorb liquids, crop-specific hydroponic formulas, chelated and nitrate micronutrients, adjuvants, water treatments, soil health and organic inputs, and a hobby line in small packs. Several bio-stimulant and biological products are marked not available in the USA market on their pages, so they’re left off this report.
Sources: Home · Fertilizers · Bio-stimulants
What each company brings
Grow More: A wide catalogue of water-soluble and hydroponic base powders, single-element micronutrients, adjuvants and water treatments, with humic, seaweed, silicon and mycorrhizal products, for farms, turf, greenhouses and hobby growers.
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
Grow More’s labels mostly print field rates per acre or per 1,000 sq ft. Where they give per-gallon rates: Seaweed Extract is 1 tsp per gallon for hydroponics at reservoir changes (about 1.3 ml/L) and 1 oz per gallon as a foliar spray (about 7.8 ml/L), every 3–4 weeks. Bloom prints ml per litre on a weekly chart.
Their powders are dosed by weight and their liquids on season-long schedules, so a per-litre number on each side isn’t the same weekly amount.
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.
Silicon and plant stressWell supported
Luyckx and colleagues (2017) pull together work showing silicon helps plants handle stress, from salt and drought to pests and disease.
Why it matters here: Silo-Tec and Bloom’s Silica both bring silicon. The paper is general plant science and doesn’t compare products.
Potassium in the plantWell supported
Hasanuzzaman and colleagues (2018) review potassium’s roles in plants, from enzyme activation and stomatal control to tolerance of drought, salt and heat.
Why it matters here: their 0-50-30 and 0-37-37 and Bloom’s PK are all PK products. The review doesn’t compare products or timing.
Sources, all viewed 5 November 2026
Grow More: Home · Fertilizers · Micronutrients · Specialty products · Adjuvants · Water management · Humic and organic acid · Organic inputs · Biological soil treatments · Bio-stimulants · 20-20-20 label · Seaweed Extract (PDF) · Humic Acid (PDF) · Foliar Cal label (PDF) · Myco-Grow label (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 Grow More; product names belong to their owners. Please confirm current details with the manufacturer. Corrections: nathan@bloomyellowbottles.com. All Fit Reports