Organic insect fertilizer

Organic Frass

The fertilizer that nourishes your plants and regenerates your soil. 100% natural, with pest-repelling chitin. The secret of circular agriculture.

Organic frass by Insectius - natural insect fertilizer
100% Organic
Circular economy
Chemical-free
Produced in Spain

Benefits by crop

What does frass bring to your plants?

Select a crop type to see the specific benefits of incorporating frass into your fertilization program.

Vegetables grown with organic insect frass
+25% improvement in crop yield
NPK balanced 3-3-3
Natural protection against nematodes and pathogens
Greater water retention in soil

Horticulture

Tomatoes, peppers, lettuce, carrots and all types of vegetables.

Frass provides a slow, steady release of nutrients that promotes vigorous growth and abundant production. The chitin present stimulates the plant's natural defenses, reducing the incidence of pests and diseases in the garden.

  • Yield increase of up to 25% in tomato and pepper trials
  • Slow nutrient release: constant feeding throughout the entire cycle
  • Chitin activates the plant's natural defenses (SAR response)
  • Improves soil structure and water retention
  • Reduces the need for chemical phytosanitary treatments
  • Promotes beneficial microbial activity in the rhizosphere
  • Compatible with certified organic agriculture
Fruit trees fertilized with organic frass
~85% organic matter
+30% improvement in rooting
Strengthens young trees and transplants
Improves organoleptic fruit quality

Fruit trees

Citrus, apple, olive, vineyards and other fruit trees.

Frass enhances root development in fruit trees, improving nutrient absorption and resistance to water stress. Its high organic matter content regenerates depleted soils and promotes higher quality fruit production.

  • Stimulates root development in young trees and transplants
  • Slow-release nitrogen avoids burns on sensitive roots
  • Improves soil structure and porosity around the tree
  • Increases water retention capacity in sandy soils
  • Chitin strengthens defenses against soil fungi (Phytophthora, Fusarium)
  • Improves fruit set and organoleptic quality
  • Ideal as a base amendment for new plantations
  • Compatible with drip irrigation and fertigation
Cannabis cultivation fertilized with organic frass
+15% improvement in terpene production
100% organic and natural
Compatible with indoor and outdoor growing
No chemical residues in the final product

Cannabis and hemp

Indoor, outdoor and greenhouse cultivation. Industrial and therapeutic use.

Frass is one of the most valued organic fertilizers in cannabis cultivation for its ability to improve the terpene profile and overall plant health. Chitin stimulates the production of secondary metabolites, resulting in more aromatic and resinous flowers.

  • Improves terpene profile and resin production
  • Stimulates secondary metabolite production via chitin
  • Gradual NPK release ideal for different cycle phases
  • Improves substrate structure in indoor cultivation
  • Natural protection against mites, thrips and fungus gnats
  • No chemical residues: clean and safe final product
  • Compatible with soil, coco and organic mixes
  • Reduces the need for additional additives and supplements
Ornamental garden fertilized with organic frass
3-3-3 balanced NPK for all plant types
0% burn risk
Greener, denser lawn in 3-4 weeks
More abundant and longer-lasting blooms

Gardening

Lawns, ornamental flowers, shrubs and houseplants.

Frass is ideal for domestic and professional gardening thanks to its gentle formulation that won't burn plants. Its balanced NPK nourishes without overfeeding, while chitin provides natural protection against common garden pests.

  • Balanced NPK 3-3-3: impossible to overdose or burn plants
  • Greener, denser and more traffic-resistant lawn
  • More abundant and prolonged flowering in ornamental plants
  • Improves long-term garden soil health
  • Natural repellent of common pests (aphids, mealybugs, spider mites)
  • Safe for pets and children: 100% natural, chemical-free
  • Easy to apply: spread and water
Organic frass by Insectius - natural fertilizer

The product

Organic Frass

Hermetia illucens

Our frass is the natural by-product of Hermetia illucens farming. The larvae transform organic waste into an exceptional fertilizer, rich in nutrients, organic matter and chitin with biostimulant and pest-repelling properties.

3% Nitrogen (N)
3% Phosphorus (P)
3% Potassium (K)
Rich in chitin Natural biostimulant that activates plant defenses and acts as a repellent against nematodes, fungi and soil pests.

Advantages

Benefits of organic frass

Balanced NPK

3-3-3 formulation providing nitrogen, phosphorus and potassium in ideal proportions for harmonious plant growth.

Pest repellent

The chitin in frass activates the plant's immune response (SAR), protecting against nematodes, fungi and soil pests.

Soil regeneration

With up to 85% organic matter, frass improves soil structure, porosity and water retention capacity.

Slow release

Nutrients are gradually released, feeding the plant throughout its cycle without risk of overdose burns.

Beneficial microbiome

Stimulates the activity of beneficial bacteria and fungi in the rhizosphere, improving nutrient absorption.

Circular economy

By-product of insect farming. Transforms organic waste into high-value fertilizer, closing the nutrient cycle.

Composition

Comparison with other fertilizers

How frass stacks up against conventional fertilizers.

Chemical Fertilizer

Conventional

€300-600/t
  • Organic matter 0%
  • NPK 15-15-15
  • Chitin
  • Degrades soil long-term
  • Contaminates groundwater
  • Petrochemical dependency

Compost

Conventional

€50-150/t
  • Organic matter 40-60%
  • NPK ~1-1-1
  • Chitin
  • Variable and inconsistent nutrients
  • Possible pathogen presence
  • No pest-repelling effect

Applications

Frass usage sectors

Organic frass is versatile and beneficial for multiple crop types and applications.

Organic farming with organic frass

Organic farming

Certifiable fertilizer for organic agriculture. Meets organic production requirements and provides nutrients without chemical residues.

Nursery with frass-fertilized plants

Nurseries and seedbeds

Ideal as an amendment in germination and transplant substrates. Stimulates rooting and protects seedlings from soil pathogens.

Professional landscaping with organic frass

Professional landscaping

Organic solution for garden, park and green space maintenance. Healthier lawns, more vibrant flowers and regenerated soil.

Extensive crops improved with frass

Extensive crops

Organic amendment for large areas. Improves soil fertility and reduces dependency on chemical fertilizers in cereals, legumes and oilseeds.

Environmental impact

Sustainability you can measure

Every ton of frass replacing chemical fertilizers generates a real, quantifiable positive impact.

-80% COâ‚‚ vs Chemical fertilizer

Drastic reduction in carbon emissions compared to the production of synthetic petrochemical fertilizers.

0 Chemical residues

Zero synthetic products. Frass is 100% natural, safe for soil, water and biodiversity.

2x Waste value

Organic waste is transformed twice: first into insect protein, then into fertilizer. Double use, zero waste.

Insectius vertical insect farm - sustainable production

Complete circular economy

Frass is the natural by-product of our insect protein production. What was once waste is now a high-value fertilizer that closes the nutrient cycle.

A single production cycle generates protein for animal feed and fertilizer for agriculture. Two products, one process, zero waste.

The context

Why do we need alternative fertilizers?

50% of European agricultural soils are degraded by intensive chemical use
170M tons of synthetic fertilizers are consumed annually worldwide
+300% chemical fertilizer prices have risen since 2020

World agriculture depends on synthetic fertilizers derived from oil and natural gas. This dependency degrades soils, contaminates groundwater and creates unsustainable price volatility.

Soils treated exclusively with chemicals lose organic matter, microbial biodiversity and water retention capacity. The result: increasingly poor soils that need ever more inputs to produce the same yields.

The solution is not in petrochemicals. It is in nature.

Competitive pricing

150 per ton
Chemical fertilizer NPK 15-15-15 €300 – 600/t
Premium compost €50 – 150/t
Request a custom quote

FAQ

Frequently asked questions about frass

Frass is beneficial for all types of plants, including vegetables, fruits, flowers, trees and shrubs. Its high content of essential nutrients and chitin improves plant health and performance, promoting more vigorous growth and higher yields.

Frass stands out for its balanced NPK 3-3-3 composition, up to 85% organic matter content and its chitin content, something unique among organic fertilizers. Chitin activates the plant's natural defenses and repels soil pests, a benefit that neither compost nor other organic fertilizers offer.

Yes. Frass is 100% natural and safe. It contains no chemicals, heavy metals or pathogens. It is safe for use in gardens, orchards, organic crops and around pets and children.

Frass can be applied in various ways: as a base amendment mixed with soil before planting, as a top dressing spread around plants, or prepared as frass tea for foliar or irrigation application. Recommended dosage is 100-200 g/m² for gardening and 500-1,000 kg/ha for extensive crops.

Chitin is a polysaccharide found in insect exoskeletons. When applied to soil, it stimulates beneficial microorganisms that break down chitin and, in the process, the cell walls of pathogenic fungi and nematodes. It also activates the plant's systemic acquired resistance (SAR), strengthening its natural defenses.

We work with orders starting from 500 kg for new customers. Frass is supplied in 25 kg bags or 500 kg/1,000 kg big bags depending on preference. We ship throughout Europe. Contact our sales team for specific conditions.

In many crops, yes. Frass can be the main nutrient source, especially in horticulture, gardening and organic farming. In high-yield extensive agriculture, it can be combined with other sources to meet specific nutrient demands during critical crop phases.

Yes. We send free samples of our frass to industry professionals who wish to evaluate the product. Contact us at hello@insectius.com or +34 628 288 809 to request your sample.

Ready to regenerate your soil?

Contact our sales team to receive a free sample and a custom quote.

Request a quote

Do you still have questions about our products, technology, or advice?

Do you have any questions?

Feel free to contact us.

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