Insect Frass 16L

(7 customer reviews)


Insect Frass is a well balanced, 100% vegan fertilizer made from the excrement and exoskeletons of bugs(mostly mealworms)

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Insect Frass is a well balanced, 100% vegan fertilizer made from the excrement and exoskeletons of bugs(mostly mealworms). Full of beneficial microorganisms and Chitin(a naturally occurring polysaccharide found in many organism — it helps plants to defend themselves against pests and pathogens)

• 100% organic and natural
• The only immediately plant-available source of chitin
• Similar to guano or castings — it’s a perfect plant food!
• Will NOT attract bugs to your garden
• Works great in hydroponics too!


Soil Amendment: This product works best if mixed into your potting media or soil prior to planting. Add 250g per 2 sq/m for raised beds and garden rows or 1 cup per 30L of bagged soil.

Root Drench: If your plants are already potted, add to dechlorinated water (1/2 cup per 5L) and root drench, or top dress and water thoroughly.

Foliar Spray: Use 1-2 tsp per 5L of dechlorinated water and apply weekly to leaves. Do NOT spray in direct sunlight.

Grower’s Tip:
Recent studies suggest that chitin signals a defense response in plants causing them to strengthen cell walls, produce larger stalks and leaves, and excrete metabolites that ward off pests and disease fungi.

7 reviews for Insect Frass 16L

  1. Beverly Grosse (Verified Customer)

    I haven’t used it yet but it will be fantastic, I have no doubt!

  2. Jacque Oosthuizen (Verified Customer)

  3. Aharon Lis (Verified Customer)

  4. JD Reverchon (Verified Customer)

    Just applied yesterday, love the texture and feel… not sure how it’s vegan since it is a insect product. have to see results. Over all I am positive on the product

    • Biocast-SA (store manager)

      Hi JD, thank you for your review. We are always delighted to hear clients feel positive about our products. Insect frass is made up of the excrement (in our case it’s worm poo) and exoskeletons of bugs (that they shed when molting) and is vegan as it is only a by-product of the insects. It is full of micro nutrients that are beneficial for plants and soil health. It also contains derivatives of chitin. Chitin is found in the cell walls of insects. The frass tricks plants into thinking they will be attacked by insects, causing their built-in resistance to pest and disease to be triggered, boosting immune response and growth rates.

  5. Christiaan (Verified Customer)

  6. Jameel (Verified Customer)

    Top Notch

  7. Theresa (Verified Customer)

    easy to use. I have treated my veggie garden and now wait to see the results.Now, a few weeks later, I can say I am very impressed. My orange tree has decided to show a promise of flowers, and my veggies are lush and really green. Thank you.

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