Closed-loop nutrition for thriving soil

BSFL frass that makes your garden lusher, greener, and more resilient.

Crafted from Black Soldier Fly larvae, our frass is a balanced, slow-release amendment teeming with beneficial microbes. It feeds soil life, accelerates rooting, strengthens plants, and keeps gardens blooming all season.

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4-3-3 nutrient analysis
Chitin for pest resilience
OMRI-listed partner farms

Lush vegetable garden with dewy greens — Real gardens nourished by BSFL frass.

Water savings

22%

Observed in raised beds using frass

Root mass

+38%

Michigan State greenhouse trial

48 hrs

Microbial activation in soil

1.5x

Faster compost decomposition

0% waste

Circular insect-based input

Why frass wins

Powerful biology, naturally balanced nutrition.

BSFL frass delivers a complete meal—nitrogen, phosphorus, potassium, calcium, and beneficial microbes—while the chitin residue triggers a plant immune response for natural pest defense.

Microbial feast

Rich in Bacillus and Streptomyces species that colonize roots and unlock tied-up nutrients for immediate plant uptake.

Gentle, slow release

A 4-3-3 plus micronutrient profile feeds steadily without burning seedlings or compacting soil.

Pest resilience

Chitin spurs the SAR pathway, helping plants better resist aphids, mites, and foliar pathogens without synthetic inputs.

Compost catalyst

Add a scoop to compost to accelerate thermophilic stages and reduce odors thanks to thriving microbes.

Use cases

Frass fits every corner of the garden.

From indoor planters to market gardens, frass excels across diverse growing styles.

Vegetable beds

Broadcast 2 cups per 10 sq ft before planting for lush leafy greens and sturdy fruiting crops.

Seed starting

Blend 5% frass into sterile mixes to add biology that helps seedlings establish faster.

Houseplants

Top-dress monthly to rebalance tired potting soil and reduce fungus gnat pressure.

Hydroponic teas

Brew aerated compost teas with frass for a microbial inoculant that clings to roots.

Turf renovation

Apply with a drop spreader at 10 lbs/1000 sq ft to rebuild soil structure under lawns and playing fields.

Compost boost

Layer carbon-heavy piles with frass to rebalance C:N ratios and finish compost in weeks, not months.

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Shop regenerative frass blends.

Sourced from verified Black Soldier Fly farms that upcycle local food scraps. Secure checkout and carbon-neutral shipping.

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Research-backed

The science behind BSFL frass.

Peer-reviewed studies and university trials validating the nutrient efficiency, pest suppression, and soil regeneration power of insect frass.

Journal of Insect Science, 2023

Enhanced disease resistance

Tomato and pepper trials showed 52% lower incidence of mildew when soil received a 10% frass amendment thanks to chitin-driven SAR responses.

Read the study

University of Florida IFAS, 2022

Improved nutrient density

Leafy greens grown with frass recorded 18% higher foliar calcium and magnesium compared to synthetic fertilizer programs.

Download report

MSU Extension, 2021

Root zone biology

Controlled greenhouse study measured a 38% increase in fine root mass with a once-per-cycle frass top-dress.

Extension article

Deep dive resources

Grow smarter with trusted partners.

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