Stronger soil structure
Supports better aeration and drainage so roots have room to develop.
Made in Canada · 100% natural
Grow healthier plants from the soil up.
RetroSoil pure organic worm castings bring life back to tired soil—helping roots grow stronger, soil hold moisture, and plants thrive naturally.
Safe for indoor plants, gardens, lawns, trees, and homes with pets.
Pure organic
Vermicompost
Locally produced in Canada
No chemical fertilizers
Gentle—won’t burn roots
Safe for plants & pets
Product of Canada
RetroSoil
Pure organic worm castings
A nutrient-rich soil amendment made by earthworms. Mix it into soil, top-dress existing plants, or brew it into worm tea—without the risk of burning roots.
- Improves aeration, drainage, and soil structure
- Helps soil retain moisture for longer
- Adds beneficial microbial activity
- Supports strong roots and healthy growth
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$29.99 CAD
$34.99
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Better soil, naturally
One simple addition. Four lasting benefits.
Worm castings work with the soil ecosystem, improving growing conditions over time instead of delivering a short chemical boost.
Steadier moisture
Helps soil hold water longer, reducing stress between waterings.
Living soil
Adds beneficial microorganisms that support a healthy soil ecosystem.
Gentle plant nutrition
Provides slow, natural nourishment without burning delicate roots.
Easy to use
Three ways to feed your soil
Use RetroSoil with new plantings or give established plants a natural boost throughout the growing season.
Mix it in
Blend worm castings into potting soil at roughly 10–20%, or add a handful around each new plant.
Top-dress
Spread a light layer around established plants, gently work it into the top 2–5 cm, then water.
Brew worm tea
Steep castings in water for 24–48 hours and use the liquid to water your plants.
A simple rhythm
Apply every 4–8 weeks during active growth.
- Indoor plants Every 4–6 weeks
- Gardens Start of season + every 8 weeks
- Trees & shrubs Spring and early fall
- Lawns Spring, midsummer, early fall
Questions, answered
Good soil shouldn’t be complicated.
Here are the questions gardeners ask us most often.
Still have a question? Contact usWhat are worm castings?
Worm castings are a natural soil amendment produced by earthworms. They improve soil structure, add beneficial microbes, and support healthy plant growth.
Does it smell?
No. High-quality worm castings have a mild, earthy smell similar to fresh soil.
Is it safe for all plants and pets?
Yes. RetroSoil is gentle and non-toxic for indoor plants, vegetables, flowers, trees, lawns, and households with pets.
Will it burn plant roots?
No. Worm castings release nutrients gently, so they can be used around delicate roots without the burn risk associated with some fertilizers.
Do you offer bulk or wholesale orders?
Yes. Contact BC Green Earth for bulk quantities and wholesale inquiries.
Green earth. Greener future.