Roots Organics and Bloom
Roots Organics on the left, Bloom on the right, matched on the job each bottle does. Their soils, dry feeds and inoculants stay put. A few liquids sit close to ours, and a couple of jobs aren’t on their list.
Last checked 5 November 2026 · Public information only
This Fit Report is a summary of publicly available information about Roots Organics 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 Roots Organics, 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 Spotted something out of date?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.
Soil-first growers, and a weekly chart on top.
Roots Organics starts in the bag: potting soils, coco, dry nutrients and inoculants, then one-part organic liquids fed in an alternating water and feed rhythm. Their kelp, fish and amino bottles sit close to Bloom’s, so those are worth a side-by-side. The clear gaps are stage-by-stage additives and a sea-mineral trace input.
- Stays as is: the soils and coco, Buddha Grow and Bloom, Terp Tea and Uprising dry feeds, Oregonism XL, Bioforce and Rain.
- Both have one: kelp, fish, amino acids, cal-mag, PK and a flower booster. Run one, or test them side by side.
- Not on their list: one additive per stage, sea minerals and a standalone silica.
Roots Organics and Bloom in short
Soils and coco, Buddha Grow and Bloom, Terp Tea and Uprising, Oregonism XL, Bioforce and Rain.
Surge, Extreme Serene, Amino-Aide, CalMag, the PK bottles and Big Swell each sit near a Bloom product.
Pre, Ultra and Final by stage, plus Sea Minerals and Silica.
Their line, Bloom’s fit at a glance
Matched on job, not NPK. Roots Organics prints rates per US gallon, Bloom per litre on a weekly feed chart. Tap a tag to filter.
Keep the bag. Bloom’s liquids go in on top of whatever media you run.
Keep the base. Bloom’s weekly additives sit alongside it.
Keep the dry feed. Bloom’s range is all liquid.
Nothing in Bloom’s range does this job, so they stay.
Helps water and sprays spread. Bloom has no wetting agent.
Both are calcium and magnesium. Theirs lists sulfur; Bloom’s lists iron and zinc. Pick one.
Both are fish and kelp. Surge runs the whole cycle; Seafuel tapers at the flush.
Both are seaweed tonics. Theirs blends five species; Bloom’s is southern bull kelp.
Both put amino acids in the feed. Roots adds B vitamins and fulvic acid and stops in the last 1–2 weeks.
All PK. Theirs run in fruiting or flowering; Bloom’s is an as-needed bottle at peak bloom.
Both are flower-stage bulking bottles. Plan the weeks so they don’t double up.
One additive for mid veg, one for the flip, one for the last two weeks.
Trace minerals from sea water, and potassium silicate added first to the tank.
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.
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, running alongside Ooze. 1 ml/L each, weekly. These are timing tools, so there’s no study cited for them here.
How it stacks. Roots Organics feeds Buddha Grow into early flower, then Buddha Bloom. The stage additives drop into those same weeks without touching the base (our read: start low, as their own pages advise for any new product).
Sea minerals and silica
What it does. Sea Minerals is trace minerals from sea water at 0.13 ml/L weekly, veg to bloom. Silica is potassium silicate, labelled 0-0-4, at 0.33 ml/L weekly, added first, veg through early flower.
How it stacks. Big Swell lists bamboo silica as a minor ingredient, but there’s no standalone silica bottle in the range. Silica goes in first, then the rest of the feed (our read: check pH after).
Kelp and fish on both sides
What it does. Seaweed is southern bull kelp; Seafuel is tuna and kelp. Both run at 1 ml/L weekly. Extreme Serene and Surge do similar jobs in the Roots Organics range.
Reviews of seaweed extracts report effects on growth and stress tolerance across many crops. Work on protein hydrolysates, which fish inputs belong to, is newer and links them to nutrient uptake. None of it tests these bottles.
Ali et al. (2021), Plants (review) · Malécange et al. (2023), Int J Mol Sci (review)
How it stacks. This is a pick-one or test-it pair, not a stack. Run Surge or Seafuel, Extreme Serene or Seaweed, and compare in your own room.
Where each bottle sits in the cycle
Roots Organics’ timing in grey, Bloom’s in yellow, across shared stages of the grow.
| Stage | Root | Veg | Flip | 3–4 | 5+ | Last 2 | Flush |
|---|---|---|---|---|---|---|---|
| Roots Organics, per their pages | |||||||
| Oregonism XL (transplant) | |||||||
| Buddha Grow | |||||||
| Buddha Bloom | |||||||
| Surge | |||||||
| Amino-Aide (Soul) | |||||||
| Ancient Amber (veg to flower) | |||||||
| Big Swell (Soul) | |||||||
| HP2 and HPK | |||||||
| 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 each Roots Organics product page. Buddha Grow and Surge carry on into bloom at a lower dose, so those weeks are pale. Big Swell stops one to two weeks before harvest. HP2 and HPK say fruiting or flowering with no set weeks, so they’re pale (our read). Bloom’s bars follow its weekly feed charts; pale Bloom bars are as-needed bottles.
Already covered
- Media. Potting soils, coco, soilless, peat and perlite.
- Base feed. Buddha Grow and Buddha Bloom liquids, or Terp Tea and Uprising dry feeds.
- Root zone. Oregonism XL and Bioforce inoculants.
- Add-ons. Kelp, fish, amino acids, cal-mag, PK, bloom boosters and a wetting agent.
Stays exactly as is
- Soils and coco. Bloom doesn’t make growing media.
- Buddha Grow and Bloom, Terp Tea, Uprising. Bloom’s additives go in around them.
- Oregonism XL, Bioforce and Rain. Bloom has nothing for these jobs.
- Surge, Extreme Serene, CalMag and the PK bottles. If they’re working in your room, keep them, or test Bloom’s next to them.
Where the programs complement each other
Their base, Bloom’s stage additives on top
Pre, Ultra and Final aren’t jobs on the Roots Organics list. They go in at 1 ml/L weekly over Buddha Grow and Bloom, or over a Terp Tea program.
Their bag, Bloom’s bottles
Roots Organics makes the soils and coco, and Bloom makes no media. Bloom’s product pages cover soil, coco and hydro, so the two sit in the same pot (our read).
Kelp, fish and cal-mag head to head
Surge and Seafuel, Extreme Serene and Seaweed, CalMag and Cal-Mag each do a similar job. A same-room test is the fair way to call it.
Background, science and sources
Who Roots Organics are
Roots Organics makes soils and organic plant nutrients out of Eugene, Oregon. Its about page says it started as a small, hands-on effort there. The site’s Facebook link is under Aurora Innovations, and its where-to-buy and careers links go to Hydrofarm.
The range runs from potting soils, coco and soilless mixes through one-part liquids (Buddha Grow and Buddha Bloom), supplements (Surge, Trinity, Extreme Serene, Ancient Amber, HP2, HPK, Rain, CalMag) and dry nutrients (Terp Tea, Uprising, guanos, Oregonism XL, Bioforce, Elemental). Amino-Aide, Big Swell and LBS. are described on their pages as the Soul line. They publish feeding schedules, list four distributors, and offer bulk, tote and custom fertility programs for commercial growers.
Sources: Home · About · Commercial grow · Distributors
What each company brings
Roots Organics: Potting soils and coco, one-part organic liquids, dry brew and top-dress nutrients, mycorrhizal and Bacillus inoculants, kelp, fish and amino supplements, PK boosters, a wetting agent, and bulk supply for commercial rooms.
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
Roots Organics prints rates per US gallon. Bloom prints ml per litre, on a weekly feed chart. At 3.785 L to the gallon, Buddha Grow’s 15 ml/gal is about 4 ml/L, Surge’s 5–15 ml/gal is about 1.3–4 ml/L, and CalMag’s 5–15 ml/gal is about 1.3–4 ml/L. Bloom’s Seafuel and Cal-Mag are 1 ml/L each, weekly.
Their soil pages say to alternate feed and plain water every one to two days; Bloom’s rates sit on a weekly chart. The same number on each side isn’t the same weekly amount, and the analyses differ too.
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.
Amino acids and protein hydrolysatesEmerging
Malécange and colleagues (2023) review protein hydrolysates and amino acids as plant biostimulants, including their links to nitrogen and other nutrient uptake.
Why it matters here: Amino-Aide, Surge and Bloom’s Roots and Seafuel all carry amino acids or fish protein. The review is general plant science and doesn’t compare products.
Sources, all viewed 5 November 2026
Roots Organics: Home · About · Feeding schedules · Liquid nutrients · Dry nutrients · Soil and media · Buddha Grow · Buddha Bloom · Surge · Extreme Serene · Ancient Amber · HP2 · HPK · CalMag · Rain · Amino-Aide · Big Swell · LBS. · Oregonism XL · Bioforce · Terp Tea Bloom · Original Potting Soil · Commercial grow · Distributors
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 Roots Organics; product names belong to their owners. Please confirm current details with the manufacturer. Corrections: nathan@bloomyellowbottles.com. All Fit Reports