If soil had a glow-up, this would be it.
Earthworm castings are a rich, dark, fine-textured organic material that looks and feels like soft, crumbly soil. No bad smell, no chunky bits, just smooth, nutrient-packed goodness. It blends effortlessly into your potting mix and gives your plants that quiet, steady boost they didn’t know they needed.
Where to Use It
Pretty much everywhere.
Earthworm castings can be added to:
•Indoor potted plants
•Outdoor containers
•Garden beds
•Seedlings and propagation trays
•Kokedamas
If it grows in soil, it will appreciate this.
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Which Plants Love It
All of them. Seriously.
From leafy tropicals like philodendrons and monsteras to flowering plants, herbs, veggies, and even more sensitive plants, earthworm castings are gentle enough not to burn roots but powerful enough to improve growth, colour, and overall health.
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How to Use It
When mixing soil:
Add about 10 to 20 percent castings into your potting mix.
Top dressing (easy method):
Sprinkle a thin layer over the top of the soil and water it in.
For kokedamas:
Mix a small amount into your soil blend to improve nutrient retention and microbial activity.
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How Often to Use It
•Top up every 4 to 6 weeks for actively growing plants
•Every 6 to 8 weeks in slower seasons
Think of it as a slow, steady feeding rather than a quick fix.
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Repotting & Refreshing Soil
Earthworm castings don’t replace repotting, but they do stretch the life of your soil.
•Refresh soil with castings between repots to keep nutrients up
•Repot plants as needed based on growth (usually every 1 to 2 years depending on the plant)
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Why It Works
Earthworm castings improve soil structure, help retain moisture, and introduce beneficial microbes that support healthy root systems. It’s not just fertiliser, it’s soil support.
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The Bottom Line
No burn. No fuss. Just better plants.
If your plants could ask for one upgrade, this would be it.