Volcanic Rock Dust
Volcanic Rock Dust - 1Kg is backordered and will ship as soon as it is back in stock.
Volcanic rock dust minerals support stronger soil and healthy plant growth by restoring over 70 essential trace elements. This natural soil amendment, made from volcanic basalt, improves plant nutrition and supports resilience to drought and pests. Suitable for vegetable beds, borders, compost bins, and wormeries.
Soil Improver for Fruit, Vegetables, and Flowers
Enrich your garden with minerals including calcium, magnesium, iron, potassium, and phosphorus. Volcanic rock dust supports the growth of tomatoes, herbs, and fruit while improving the soil structure for long-term plant health. Apply year-round, avoiding frozen or windy conditions for best results.
Improve Soil Microbes and Clay Structure
This natural amendment boosts microbial activity, enhances drainage, and supports root development. It’s particularly useful for improving heavy clay soils, encouraging breathability and structure by feeding beneficial soil organisms. For even better results, combine with organic seaweed feed
Use in Compost, Beds, and Wormeries
Apply volcanic rock dust directly to beds or lawns, mix into compost heaps, or sprinkle over wormeries. It accelerates composting, reduces odours, and increases temperature. In wormeries, it enriches compost and attracts earthworms.
Benefits
- Reintroduces minerals to soil for tastier crops
- Supports strong root development and improved yields
- Boosts microbial life and composting processes
- Improves clay soil structure and drainage
- Safe to use in wormeries, raised beds, and pots
Sizes Available
| Pack Size |
|---|
| 1kg |
| 1kg Refill Bag |
| 2.5kg |
| 5kg |
| 10kg |
| 20kg |
Specifications
| Material | Volcanic Basalt Rock |
| Trace Elements | 70+ including calcium, magnesium, iron, potassium |
| Application Rate | 0.5kg per m² annually or 2kg per m² as a booster |
Frequently Asked Questions
Can volcanic rock dust be used in wormeries?
Yes, volcanic rock dust works well in wormeries. Apply a small handful per square foot monthly to enrich compost and support healthy worm activity.
Is volcanic rock dust suitable for year-round use?
Yes, it can be applied any time of year except during frozen or very windy conditions. Earthworms help draw minerals into the soil throughout the growing season.
How does volcanic rock dust improve clay soil?
It supports the growth of soil organisms which helps break up compacted clay, improving drainage and root development in heavy soils.
Can this be used as a compost accelerator?
Yes, volcanic rock dust increases microbial activity in compost piles, raising temperature and speeding up decomposition while helping to reduce odours.
Volcanic Rock Dust
Reviews
Reviews
How To Use
How To Use
Top Dressing:
Spread at any time of year unless frozen or windy conditions.
Recommended per annum: 0.5kg / m² (good handful / square yard) = 2 tonnes / acre
Booster:
2kg / m² = 8 tonnes / acre
Plant Pots, Tubs; Baskets:
Sprinkle level tablespoonful onto 15cm (6 inches) surface diameter of compost or soil and water in as usual. Two applications per year.
Compost Activator and Accelerator:
Each time you add a new layer of compost to your compost bin or pile, add a light covering over the surface that you can easily see through. Speeds up the breakdown and reaches higher temperatures and reduces odours.
Wormeries:
Sprinkle a small handful per 30cm² (1ft²) onto the surface of your wormery every month. Try a small area with this amount and see the worms congregate.
More Information
More Information
Clay Soil: The principle function of the rock dust is that the minerals in it boost the living organisms of the soil ie everything from the bacteria to the worms. These will be struggling in sticky clay soil as it has the normal breathing pores will be full of water / sticky clay particles.
