What Are Worm Castings?
Worm castings, also known as vermicast, are the nutrient-rich byproduct of earthworms digesting organic material. They’re packed with essential plant nutrients like nitrogen, phosphorus, and potassium, along with beneficial microbes that help improve soil biology.
Adding worm castings to your soil mix boosts root development, improves water retention, and helps plants access nutrients more easily. They also enhance soil structure, making it lighter, fluffier, and better draining.
How to Use Worm Castings
- Mix into soil blends: Add a handful to your soil mix to give young plants an organic boost right from the start.
- Top dress houseplants: Sprinkle a thin layer over the soil surface to deliver slow-release nutrients during the growing season.
- Refresh tired soil: Revitalise older plants by working some castings into the top few centimetres of their soil.
A little goes a long way! Worm castings are gentle but powerful, feeding plants slowly and naturally without the risk of burning roots.
Why We Love Them
Worm castings are a natural, sustainable way to support plant health. They're safe for almost any houseplant, beginner-friendly, and help create stronger, more resilient root systems over time. Whether you're repotting, mixing your own soil, or just refreshing a tired plant, castings are one of the easiest organic upgrades you can make.
Take a look at our Worm Castings and maybe give them a go!