KiS Organics Bloom Booster 2-8-6 product label with a red flower graphic and instructions for organic flower growth.

KiS Organics Large Bloom Booster 2-8-6

$93.71
$93.71 $124.95
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KiS Organics Bloom Booster 2-8-6 product label with a red flower graphic and instructions for organic flower growth.
  • KiS Organics Bloom Booster 2-8-6 product label with a red flower graphic and instructions for organic flower growth.
  • KiS Organics Bloom Booster (2-8-6) in a plain white plastic bag, packed inside a cardboard shipping box.
  • KiS Organics Bloom Booster 2-8-6 product label with a red flower graphic and instructions for organic flower growth.
  • KiS Organics Bloom Booster (2-8-6) in a plain white plastic bag, packed inside a cardboard shipping box.
KiS Organics Large Bloom Booster 2-8-6

KiS Organics Large Bloom Booster 2-8-6

$93.71
$93.71 $124.95

The P and K your plants need in flower —
from the cleanest sources on mother earth.

Most organic bloom boosters source phosphorus from bat guano or mined rock phosphate - both carry elevated cadmium and lead. KiS built this around fish bone meal instead: a cleaner P source, paired with potassium sulfate, insect frass, alfalfa meal, gypsum, and wollastonite. Dry top-dress - apply, scratch in lightly, water. The Large bag has 65 cups, sized for multi-plant grows or repeat runs.

No guano · No rock phosphate No synthetics · No fillers Low heavy metal sourcing
Free shipping on orders over $49
30-day returns on all orders
Serving growers since 2006
Why it matters how P is sourced
Traditional PK Boosters vs. KiS Organics Bloom Booster
Typical Organic P/K Boosters
  • Guano and mined rock phosphate carry elevated cadmium and lead
  • Heavy metal contamination is the most common reason organic grows fail third-party testing
  • Guano sourcing raises ecological concerns - bat colonies disturbed for harvest
  • Liquid PK boosters require measuring, pH testing, and per-watering dosing
  • Most dry bloom boosters designed for field/garden use, not container timing
  • Single P/K focus - no supporting inputs for cell wall structure or pest suppression
KiS Bloom Booster 2-8-6
  • Fish bone meal as the P source - cleaner heavy metal profile than guano or rock phosphate
  • Developed specifically to minimize heavy metal levels - not a reformulated field blend
  • No guano - potassium sulfate and insect frass are the K and secondary N sources
  • Dry top-dress - sprinkle on, water in, done. No measuring liquids or pH testing
  • Application schedule designed for containers and raised beds specifically
  • Wollastonite and gypsum included for calcium, silicon, and sulfur support

What the Large bag gets you

65 cups
Total volume in the Large bag - 268g per cup
130x
Top-dress a 5-gal pot at the full rate (½ cup per application)
65 sq ft
Raised bed coverage at ½ cup per sq ft (single application)
65x
Top-dress a 10-gal pot at the full rate (1 cup per application)
What's in it and why it matters
Six ingredients, each doing a specific job

Fish bone meal - high phosphorus without the heavy metal risk No guano

Guano and mined rock phosphate regularly carry elevated cadmium and lead. Fish bone meal delivers comparable phosphorus from skeletal calcium phosphate - a cleaner source that doesn't carry the same geological contamination profile.

Potassium sulfate - soluble K plus sulfur, no chloride buildup

Provides potassium for flower energy and water balance plus sulfur for amino acid synthesis, without the chloride salt accumulation that comes with the cheaper potassium chloride alternative.

Insect frass - slow-release nitrogen plus chitin Dual function

Contributes nitrogen to prevent early-flower deficiency, and delivers chitin - which triggers the plant's systemic immune response against fungal pathogens and certain pests without any spray program.

Alfalfa meal - fast nitrogen plus triacontanol

Fast-releasing dry nitrogen source that also contains triacontanol - a natural plant growth hormone that stimulates root growth and can accelerate early flower site development.

Wollastonite - calcium silicate for cell wall strength Uncommon ingredient

Calcium silicate (CaSiO₃) provides calcium and silicon simultaneously. Silicon deposits in plant cell walls, mechanically strengthening them against pest pressure and stress - rarely found in pre-blended bloom amendments.

Gypsum - calcium and sulfur without affecting pH

One of the only calcium sources that doesn't raise soil pH on application - useful in a living soil that's already pH-buffered by the base mix, and mildly improves drainage in dense container profiles.

Specs
Numbers and details
NPK Analysis
2 – 8 – 6
Bag Size (Large)
65 cups · ~38 lbs
Container Rate
½ cup per 5-gal pot
Raised Bed Rate
½ cup per sq ft
Container Frequency
Every 2–3 weeks, late veg through mid-flower
Bed Frequency
Once at flower start; optional second mid-flower
Cup Weight
268g per cup · 1.69 cups per lb
Application Method
Top-dress, scratch in lightly, water

Full Ingredient Disclosure

Alfalfa meal, Fish bone meal, Potassium sulfate, Insect frass, Gypsum, Wollastonite.

How to apply

1

Start at late veg or flower flip

Begin when flower sites are forming. Containers 15 gal and under: apply every 2–3 weeks. Beds: single application at flower start is usually enough.

2

Measure and top-dress

½ cup per 5-gal container, scaled for larger pots. ½ cup per sq ft for raised beds (a 4×4 bed = 8 cups). Sprinkle evenly and scratch lightly into the top half-inch if possible.

3

Water in thoroughly

Water to field capacity immediately after applying. The dry amendments require moisture to activate - don't let them sit dry on the surface.

4

Optional second application mid-flower

For heavy feeders or pots under 10 gal, a second application mid-flower keeps P and K from running short. Stop all applications 4–6 weeks before harvest.

In the bag
Large bag contents - and which size fits your setup
Large bag includes
  • 65 cups of Bloom Booster 2-8-6 (~38 lbs)
  • Fish bone meal - organic phosphorus, low heavy metal profile
  • Potassium sulfate - available K plus sulfur, no chloride buildup
  • Insect frass - slow-release N plus chitin for plant immunity
  • Alfalfa meal - fast N plus triacontanol growth hormone
  • Wollastonite + gypsum - calcium, silicon, and sulfur support
Size comparison - which bag to buy
  • Small (5 cups) - 10 top-dresses on a 5-gal pot
  • Regular (23 cups) - ~46 top-dresses on a 5-gal pot
  • Large (65 cups) - ~130 top-dresses on a 5-gal pot
  • Works with: KiS Water Only Soil, KiS Biochar Mix, and any other organic living soil
Not sure which size fits your setup? Call or email - we'll help you figure out exactly how many applications you need per cycle. 716-217-0353 / help@happyhydro.com
Questions
Frequently asked questions
The KiS soils carry most plants through a full cycle without it. The Bloom Booster is most useful for heavy-feeding varieties in containers 15 gal and under, or when you want to proactively push P and K through peak flower demand rather than wait for deficiency signs. KiS includes a cup of it with their Westport Soil Blend - it's an optional push, not a required fix.
Bat guano picks up metals from the insects bats eat; mined rock phosphate is co-deposited with cadmium in geological formations. Fish bone meal sources phosphorus from skeletal calcium phosphate - it doesn't carry the same contamination profile. KiS built this formula around that difference specifically.
At the recommended rate, no - nutrients are biologically bound and release at a pace the plant can use. Don't apply at 2–3x the rate; the alfalfa meal can spike nitrogen if over-applied. Gypsum, wollastonite, and potassium sulfate are all pH-neutral and won't disrupt your soil buffer.
Yes - on any biologically active organic soil. The dry amendments need living microbes to break them down and cycle them into plant-available forms. They won't work well in sterile or inert media. Application rates and timing are the same regardless of soil brand.
Stop 4–6 weeks before your target harvest date. Applying too close - especially the alfalfa meal - can push nitrogen-driven green growth when the plant should be finishing. The late flower period is when you back off, not add more.
Email a photo of any damage to help@happyhydro.com and we'll make it right - replacement or refund, your call. Change-of-mind returns accepted within 30 days on items in new condition. Not sure this is right before ordering? Call us at 716-217-0353.
Happy Hydro has been selling growing equipment and amendments since 2006. We carry KiS because the formulas are thought through - the heavy metal sourcing on this product is a good example. Call 716-217-0353 or email help@happyhydro.com.

 

 

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