Black Soldier Fly Frass – Premium Organic Soil & Plant Booster

Feed your soil. Grow stronger plants. Turn waste into life.

Black Soldier Fly Frass is a nutrient-rich organic soil amendment and natural fertiliser produced through the remarkable life cycle of the Black Soldier Fly (Hermetia illucens).

As Black Soldier Fly larvae process organic material, they create a valuable agricultural resource known as frass. This naturally occurring material contains organic matter, plant nutrients and biologically active compounds that can help support healthier soil, stronger root systems and productive plant growth.

Rather than simply feeding your plants, Black Soldier Fly Frass helps support the entire soil ecosystem.

Healthy soil is alive with microorganisms, fungi and other beneficial organisms. By adding organic matter and nutrients back into the soil, frass can help create a more fertile and biologically active growing environment.

Why use Black Soldier Fly Frass?

Natural organic nutrition

Black Soldier Fly Frass contains plant nutrients and organic matter that can support healthy growth and long-term soil fertility.

Supports healthy soil biology

A healthy soil ecosystem is essential for healthy plants. Frass can support microbial activity and nutrient cycling within the root zone.

Contains naturally occurring chitin

Insect-derived materials naturally contain chitin and related compounds. Chitin is of particular interest in regenerative and biological growing systems because of its interactions with soil microorganisms and plant defence responses.

More than just fertiliser

Unlike purely mineral fertilisers that primarily provide immediately available nutrients, Black Soldier Fly Frass also contributes organic material to the soil.

This makes it an excellent addition to:

• Vegetable gardens

• Raised beds

• Flower gardens

• Fruit trees

• Herbs

• Indoor and outdoor container plants

• Soil mixes

• Regenerative gardens

• Organic growing systems

Supports stronger, healthier soil

Regular use of organic soil amendments can help improve the overall growing environment by supporting:

• Soil fertility

• Organic matter levels

• Nutrient cycling

• Beneficial microbial activity

• Soil structure

• Root-zone health

• Long-term soil productivity

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What is Black Soldier Fly Frass?

Black Soldier Fly Frass is the natural residual material produced during the rearing of Black Soldier Fly larvae.

Depending on the production process, frass may contain a combination of:

• Organic matter

• Plant nutrients

• Residual organic material

• Insect-derived material

• Beneficial microorganisms

• Naturally occurring chitinous compounds

The exact composition of Black Soldier Fly Frass can vary depending on the larvae’s diet and how the final product is processed. For this reason, the nutrient analysis of the specific product should always be used when precise fertiliser calculations are required.

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How to Use Black Soldier Fly Frass

For vegetable gardens and flower beds

Apply to the soil around your plants and gently work it into the top layer of soil.

Water thoroughly after application.

Suggested starting application:
Use approximately 50–100 g per square metre, depending on soil condition and plant requirements.

For poor or depleted soil, use the lower rate initially and observe plant response before increasing future applications.

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For established plants

Sprinkle a light layer around the root zone, keeping the product away from direct contact with the plant stem.

Gently work into the surface of the soil and water afterwards.

Suggested starting application:
Approximately 1–2 tablespoons for small plants and ¼–½ cup for larger established plants.

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For pots and containers

Mix Black Soldier Fly Frass thoroughly into your growing medium before planting, or apply lightly as a top dressing.

Suggested starting application:
Approximately 1–2 tablespoons per 10 litres of growing medium.

For established container plants, apply a small amount to the surface of the soil and water in.

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For seedlings and young plants

Young plants can be sensitive to concentrated fertiliser products.

Use Black Soldier Fly Frass sparingly around seedlings and avoid placing concentrated amounts directly against roots or stems.

For seedling mixes, ensure the frass is thoroughly blended into the growing medium rather than concentrated in one area.

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For fruit trees and larger shrubs

Apply around the drip line rather than directly against the trunk.

Gently incorporate into the soil surface and water afterwards.

The amount required will depend on the size of the plant and condition of the soil. Start with a modest application and increase gradually as needed.

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How Often Should I Apply?

Black Soldier Fly Frass can generally be used as part of a regular soil-feeding programme.

A practical starting approach is:

• Before planting: Incorporate into the soil or growing medium.

• During active growth: Apply lightly every 4–8 weeks.

• Between growing seasons: Add to garden beds to help rebuild soil organic matter and fertility.

Application requirements can vary depending on the crop, soil condition, watering practices and nutrient requirements of your plants.

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Important Application Advice

Black Soldier Fly Frass is a concentrated biological soil input and should be used sensibly.

More is not always better.

Because frass products can vary in nutrient concentration, moisture content, salinity and maturity, we recommend starting with moderate application rates and increasing gradually if required.

Always:

• Mix thoroughly into the soil where possible.

• Water after application.

• Avoid excessive application.

• Avoid placing concentrated product directly against stems or roots.

• Use the product’s specific nutrient analysis for commercial crop calculations.

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A Sustainable Fertiliser for the Future

Black Soldier Fly Frass represents an exciting step forward in sustainable agriculture and the circular economy.

Organic materials that might otherwise become waste can be biologically transformed into valuable agricultural resources.

The result is a soil amendment that helps return nutrients and organic matter to the soil.

By using insect-based fertiliser products such as Black Soldier Fly Frass, growers can support a more circular approach to agriculture:

Organic resources → Black Soldier Fly larvae → valuable agricultural products → healthier soils → stronger plants.

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Why Healthy Soil Matters

Plants do not grow in isolation.

The soil around their roots is a living ecosystem where nutrients, microorganisms, water, oxygen and organic matter all interact.

Healthy soil can help plants access nutrients more effectively and develop stronger, more resilient root systems.

Black Soldier Fly Frass is designed to become part of that system — helping provide organic material and nutrients while supporting a more biologically active growing environment.

Whether you are growing vegetables, flowers, herbs, fruit or ornamental plants, healthier soil is the foundation of healthier growth.

Grow Folk Black Soldier Fly Frass

A sustainable, nutrient-rich organic soil amendment for gardeners who want to feed the soil — not just the plant.

Ideal for:

✓ Vegetable gardens
✓ Raised beds
✓ Flowers
✓ Herbs
✓ Fruit trees
✓ Houseplants
✓ Container gardens
✓ Organic growing
✓ Regenerative gardening
✓ General soil improvement

Feed the soil. Support the ecosystem. Grow something better.