Insect Frass (High Calcium & Chitin)

Insect frass is the castings (poop) of black soldier fly larvae. It’s naturally rich in beneficial microbes, chitin, and plant-available nutrients—basically a tiny powerhouse for soil life.

It boosts microbial diversity, brings gentle, balanced nutrition (with trace minerals), improves soil structure and water-holding, and the chitin helps prime plants’ natural defences. It’s sustainable and far less whiffy than many manures.

Yes. It’s an organic input and leaves no harmful residues when used as directed.

No. Used properly, it shouldn’t attract pests—and the chitin signal can even help deter some sap-suckers. If you see pests, they’re usually opportunists from other causes (overwatering, stressed plants, etc.).

• Potted plants: 1–2 tablespoons over the surface, water in; repeat every 4–6 weeks
• Garden beds: 50–100 g per m², mix into the top ~5 cm (per season)
• Fruiting trees: 250–500 g around the drip line in spring and autumn
• Potting mixes/soilless media: 15–30 g per 30 L of media (about 1 heaped tbsp ≈ 3–4 g)

It’s forgiving, but more isn’t always better. Stick to the guidelines—excessive amounts can throw off nutrient balance or crowd out the microbes you want.

• Beds: once a growing season (spring, and optionally autumn)
• Pots: every 4–6 weeks
• At pot-up: mix into new media
• Top-dress anytime: sprinkle and water in

• Top-dress: sprinkle evenly on the soil surface, then water in
• Mix-in: blend into potting mixes at the rates above
• Tea/drench: steep in dechlorinated water and drench promptly (don’t store)
• Compost boost: a handful per ~20 L of compost kicks decomposition along

Very mild, earthy scent. Generally considered low odour.

Common packs are 5 L (~2.3 kg) and 10 L (~4.6 kg). Check the store for current pricing and availability.

Store sealed, cool, and dry. Because it’s biologically active, freshness matters—aim to use within a season or two once opened.

Absolutely. It pairs well with compost, rock dusts, organic fertilisers, and living-soil programs. Avoid stacking with harsh synthetic salts at heavy rates.

Typically pH-friendly (neutral-ish). If you grow pH-sensitive species, check occasionally and adjust your routine as needed.

Frass is an organic input by nature. If you need formal approval, check your scheme’s allowed-input list and batch docs.

Yes—use the 15–30 g per 30 L guideline for coco/soilless mixes. For true hydro (recirculating systems), frass isn’t ideal in reservoirs; use as a media amendment or drench, not a long-term tank additive.

Often within weeks: perkier growth, better root development, and livelier soil. Full benefits—like resilience and yield—tend to show across a full season.

Properly made frass is dominated by beneficial biology. Store correctly to keep it clean and active.

This frass is naturally high in calcium (great for cell walls) and chitin (the immune-priming signal plants “read”).

Frass generally has denser microbial life, includes chitin (worm castings don’t), and can be used at lower rates. Compost is fantastic bulk organic matter; frass is more of a potent bio-boost.

That can happen with living amendments. A little white, fuzzy microbial bloom is normal. Keep it dry and cool; if in doubt, spread and dry before re-bagging.

Yes—use the 1–2 tbsp every 4–6 weeks top-dress guidance, water in, and enjoy happier, more resilient plants.