Humboldt County’s Own and Bloom
Humboldt County’s Own makes a three-part base and a shelf of additives, most of them for flower. Here’s their range next to Bloom’s, and where each one sits in the grow.
Last checked 5 November 2026 · Public information only
This Fit Report is a summary of publicly available information about Humboldt County’s Own 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 Humboldt County’s Own, 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 Spotted something out of date?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 flower-heavy shelf, with room at the root end.
Most of HCO’s additives work in bloom: G10, Purple Maxx, Magnum, Crystal Burst and Sonic Bloom. Their list has no root product, humic acid, fish input, sea minerals or silica. Those are the Bloom bottles that sit underneath a Deep Fusion program, weekly from the start.
- Stays as is: Deep Fusion Micro, Grow and Bloom, Killer Tea, Snow Storm Ultra, G10 and Purple Maxx.
- Both have one: a sugar-type enhancer, magnesium and PK. Run one, or test them side by side.
- Not on their list: root support, humic acid, tuna, sea minerals, silica and stage additives for veg and the flip.
Their line, Bloom’s fit at a glance
Matched on job, not NPK. HCO prints rates in teaspoons or ml per gallon (1 tsp is 5 ml); Bloom prints ml per litre on a weekly feed chart. Tap a tag to filter.
Keep your base. Bloom’s additives sit on top of it.
Bloom has no guano or casting tea, so it stays.
Their page doesn’t spell out its job, so it stays as part of their program (our read).
A flowering additive their page doesn’t break down further. It stays.
Their page doesn’t list its analysis. It runs in the same window as Ooze and Final, so watch runoff if you stack them (our read).
Both put a sugar source in the feed. Deep Breath stops after early bloom; SWTNR runs to the flush.
Both carry magnesium. Magnum adds sulfur; Cal-Mag adds calcium, iron and zinc. Plan around both.
All three are PK. HCO’s start around flower week 2; Bloom’s PK is an as-needed bottle. Pick one.
Amino acids, B vitamins and fulvic acid, cuttings through flower.
10% humic acid, plus trace minerals from sea water.
Tuna and kelp, clone through late flower, tapering at the flush.
Potassium silicate, labelled 0-0-4, veg through early flower.
One bottle for mid veg, one for the flip and stretch.
Where each bottle sits in the cycle
Humboldt County’s Own’s timing in grey, Bloom’s in yellow, across shared stages of the grow.
| Stage | Root | Veg | Flip | 3–4 | 5+ | Last 2 | Flush |
|---|---|---|---|---|---|---|---|
| Humboldt County’s Own, per their pages | |||||||
| Deep Fusion Micro, Grow and Bloom | |||||||
| Deep Breath | |||||||
| Snow Storm Ultra (HCO) | |||||||
| Killer Tea (soil) | |||||||
| Crystal Burst or Sonic Bloom | |||||||
| Magnum | |||||||
| G10 (from week 3) | |||||||
| Purple Maxx (last 2–3 weeks) | |||||||
| 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 HCO product page. Deep Fusion runs veg through bloom with the ratio shifting, drawn as one bar. Crystal Burst and Sonic Bloom start around flower week 2 and stop a week before harvest. Purple Maxx carries on through the flush if you flush. Their feeding schedule chart is an image we couldn’t read, so it isn’t used. 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.
Roots and Humate at the bottom of the stack
What it does. Roots is amino acids, B vitamins and fulvic acid at 0.5 ml/L weekly, or 1 ml/L as a cutting dip. Humate is 10% humic acid at 2.5 ml/L weekly, seedling through flush.
A major review links humic substances to changes in root structure and function tied to nutrient uptake, including more lateral roots. It doesn’t test either company’s products.
How it stacks. HCO’s range starts at clones with Deep Breath and Snow Storm. Roots and Humate add root-zone support underneath, weekly, without changing the Deep Fusion ratios (our read).
Tuna and sea minerals
What it does. Seafuel is tuna and kelp at 1 ml/L weekly, clone through late flower. Sea Minerals is trace minerals from sea water at 0.13 ml/L weekly, veg to bloom.
Work on protein hydrolysates, the group fish inputs belong to, is newer. A 2023 review links them to nutrient uptake and stress response, mostly in trials under stress. It doesn’t test these bottles or cannabis.
How it stacks. Deep Fusion already has kelp in it and Micro carries chelated micros, so these add the fish side and sea-water minerals rather than doubling up (our read).
Silica, Pre and Ultra before the bloom shelf
What it does. Silica is potassium silicate at 0.33 ml/L weekly, added first. Pre runs mid veg (weeks 2–3), Ultra at the flip (flower weeks 1–2), 1 ml/L each. These are timing and mixing tools, so there’s no study cited for them here.
How it stacks. HCO’s flower additives mostly kick in from week 2 or 3. Pre and Ultra fill the weeks before that, so the two ranges don’t stack on the same week (our read).
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.
Where the programs complement each other
Roots and Humate under Deep Fusion
HCO’s list has no root, humic or silica product. Roots, Humate and Silica go in weekly under Deep Fusion from the start, before their flower shelf kicks in.
Seafuel and Sea Minerals alongside their kelp
Deep Fusion has kelp blended in. Seafuel adds tuna and Sea Minerals adds sea-water trace minerals, at 1 ml/L and 0.13 ml/L weekly.
Pre and Ultra fill the early weeks
Most HCO additives run from flower week 2 or 3. Pre and Ultra sit in mid veg and the flip, so the weeks don’t double up (our read).
Already covered
- Base feed. Deep Fusion Micro, Grow and Bloom, veg through bloom.
- Veg and early bloom. Deep Breath and Snow Storm Ultra.
- Flower. G10, Magnum, Purple Maxx, and Crystal Burst or Sonic Bloom.
- Soil tea. Killer Tea, guano and worm castings.
Stays exactly as is
- Deep Fusion. Bloom’s additives go in around it.
- Killer Tea. Bloom has no guano or casting product.
- Snow Storm Ultra, G10 and Purple Maxx. No direct Bloom match, so they stay.
- Deep Breath, Magnum and their PK. If they’re working in your room, keep them, or test Bloom’s next to them.
Background, science and sources
Who Humboldt County’s Own are
Humboldt County’s Own is a small, family-owned nutrient maker in Humboldt County, Northern California. Their About page says the business started in 2002 and has been run by the founder’s son since 2012. They bottle everything in-house, number each batch and send product for independent lab testing.
The range is the Deep Fusion three-part base (Micro, Grow and Bloom), Deep Breath, Snow Storm Ultra, G10, Magnum, Purple Maxx, Crystal Burst, Sonic Bloom and Killer Tea, plus starter and sample packs. They publish a feeding schedule, a nutrient calculator and a store finder, and sell from their own site.
Sources: Home · About us · Feeding schedule · Store finder
What each company brings
Humboldt County’s Own: A three-part base with kelp built in, a deep shelf of flower additives, two PK boosters, a magnesium and sulfur supplement, a guano and casting tea, and in-house bottling with numbered batches.
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
HCO prints rates in teaspoons or ml per gallon. At 5 ml to the teaspoon and 3.785 L to the gallon, 1 tsp per gallon is about 1.3 ml/L. That’s the soil rate for G10, Magnum, Crystal Burst and Snow Storm Ultra. Killer Tea at 1 oz (30 ml) per gallon is about 7.9 ml/L. Bloom prints ml per litre on a weekly feed chart.
G10’s soil rate is with every watering; most other HCO pages give a rate with no set interval. Bloom’s sit on a weekly chart, so the same 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.
Potassium in the plantWell supported
Hasanuzzaman and colleagues (2018) review potassium’s roles in plants: protein synthesis, carbohydrate metabolism, enzyme activation, stomatal control and photosynthesis, plus tolerance to salinity, drought and heat.
Why it matters here: Crystal Burst, Sonic Bloom and Bloom’s PK are all PK products, so potassium is the shared ground. The review is general plant science and doesn’t compare products or timing.
Sources, all viewed 5 November 2026
Humboldt County’s Own: Home · About us · Feeding schedule · Deep Fusion Micro · Deep Fusion Grow (Humboldt County’s Own) · Deep Fusion Bloom · Deep Breath · Snow Storm Ultra (Humboldt County’s Own) · G10 · Magnum · Purple Maxx · Crystal Burst · Sonic Bloom · Killer Tea
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 Humboldt County’s Own; product names belong to their owners. Please confirm current details with the manufacturer. Corrections: nathan@bloomyellowbottles.com. All Fit Reports