What the Frass?

Boost Plant Defenses Naturally: The Chitin Advantage of Frassilizer™

Why Frassilizer?

Looking for a better way to fertilize? Made purely from insect frass, Frassilizer feeds your soil essential nutrients (NPK 3-4-2) and uniquely delivers chitin to naturally boost your plants' own defenses against pests and stress, all without synthetic chemicals.

What is Frass?

Simply put, it's the natural and organic waste from raising mealworms. Frass consists of the dry excrement of the mealworm together with their shedded exoskeletons (which include chitin) and a small amount of leftover food (wheat bran, carrots, and potatoes). It's a powerhouse of slow-release nutrients and beneficial microbes. Learn More

Chitin strengthens plant's natural defenses.

✔ Chitin helps with the uptake of nitrogen as well as improving the absorption of calcium, phosphorus, and magnesium.
✔ Chitin can boost the plant's immune system. It does this by tricking the plant into thinking it is getting attacked, even though it isn't, which triggers the plant to toughen up.
✔ Chitin causes the plant to produce a chitinase enzyme, which can make harmful insects "itchy."
✔ Chitin boosts the beneficial microbes in the soil, which are essential for breaking down organic matter into food for the plant's root systems.

mealworm frass on a trowel getting applied to strawberry plants

Give it a try and see for yourself. Use coupon code "RSHIP25" at checkout to get free shipping on a 28oz package of all-purpose, natural Frassilizer fertilizer.

cartoon with 3 gardeners explaining why they don't like using chemicals and pesticides

What do people say about using pesticides in their gardens?

➔ "I avoid pesticides because I don't want to ingest them"
➔ "I do not like using chemicals"
➔ "I don’t like knowing they contaminate our soil"
➔ "I have pets and I don't like to use chemicals"
➔ "Only used wasp traps, do not actively attempt to eliminate other insects or fauna"
➔ "Beneficial insects can be expensive, and chemical sprays kill everything."

DISCLAIMER: Frassilizer is NOT a pesticide. It does not kill pests.

DISCLAIMER: Frassilizer is not certified organic. When we use the word organic, we just mean the opposite of synthetic. In this context, "organic" refers to substances derived from natural sources (plants, animals, or minerals) that are minimally processed, while "synthetic" refers to substances created in labs or factories through chemical processes, often from petroleum or petrochemicals. We're trying to highlight that insect frass is an organic, not synthetic, fertilizer, as it is derived from animals (insects).