Vermicompost: Benefits and How to Use It for Healthier Plants

If you grow anything — a balcony of pots, a terrace garden, or a full field — vermicompost is one of the simplest upgrades you can make to your soil. It is the dark, crumbly, earthy-smelling material that earthworms produce as they digest cow dung and organic waste, and it is often called the richest natural fertiliser available. Here is what it does, how much to use, and how to apply it correctly.

What is vermicompost

Vermicompost is compost made with the help of earthworms. When worms are fed a mix of cow dung and plant waste, what they leave behind — worm castings — is a fine, dark, nutrient-dense material teeming with beneficial microbes. Unlike raw manure, good vermicompost is fully broken down, odour-free, and gentle enough to use directly around plants without burning their roots.

Benefits of vermicompost

• Feeds plants gently and steadily. It releases nutrients slowly, so plants get a steady supply instead of the spike-and-crash of chemical fertiliser.
• Rebuilds living soil. It adds beneficial microbes and organic matter that improve soil structure, so soil holds water better and drains better at the same time.
• Will not burn roots. Because it is fully composted, you can mix it straight into pots and beds — no waiting, no scorching.
• Improves germination and root growth. Seedlings started in a vermicompost mix tend to establish stronger, healthier roots.
• Completely organic and safe. Safe around children, pets and edible plants, with no synthetic chemicals.

Vermicompost vs chemical fertiliser vs raw cow dung

Chemical fertiliser gives a fast nutrient hit but does nothing for long-term soil health, and overuse hardens and depletes the soil. Raw cow dung is excellent, but if it is not fully composted it can burn roots and attract pests. Vermicompost sits in the sweet spot: all the richness of cow dung, fully broken down, safe to use immediately, and building your soil with every application. Many gardeners use vermicompost as their main feed and keep raw cow dung manure for enriching beds between seasons.

How much vermicompost to use

• Potted plants: mix roughly 20–30% vermicompost into the potting soil, or top-dress with a handful or two per pot every 4–6 weeks.
• Raised beds and vegetable gardens: about 1–2 kg per square metre, worked into the top few inches of soil before planting.
• Individual saplings / trees: 1–2 kg mixed into the planting pit; refresh a couple of times a year.
• Lawns: a thin, even top-dressing, then water it in.

Vermicompost is forgiving — it is very hard to over-apply — so treat these as starting points and adjust to your plants.

How to apply vermicompost

• Top-dressing: sprinkle it around the base of the plant and water. The nutrients wash down with each watering.
• In the potting mix: blend it into soil before planting or repotting.
• Compost tea: steep a handful in water overnight, strain, and use the liquid as a mild foliar feed.

Milkaaru makes vermicompost (kentu khaad) from the dung of our own grass-fed Gir herd in Gothan, Surat, and ships it across India in 1 kg, 5 kg and 10 kg packs. Explore it with the rest of our farm range on the products page.