Volcanic Rock Dust Organic Fertiliser | Soil Re-Mineraliser and Compost Activator

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  • Top Dressing, for growing medium i.e. Soil and/or Compost.
  • Compost Improver to mix with every bag or bin of mature compost.
  • Eco-friendly & enhances soil’s natural ability to capture and store carbon.
  • Compost Activator and Accelerator for compost making systems.
  • Tonic for Wormeries – encourages beneficial organisms and microbes with soil & compost.
  • Salt Replacement – for cars or vans if stuck in snow and icy surfaces.
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Product Description

Volcanic Rock Dust

Understanding how volcanic rock dust works to help the soil is easy. Plant roots are voracious feeders that suck minerals out of the soil around them, and over time this depletes the soil’s natural reserves, causing plants to become stunted. By adding volcanic rock dust back to the soil, it makes it accessible to plant roots as soon as they make contact with it. As the rock continues to break down, additional nutrients are made available to the plant roots. Thus, guaranteeing them a consistent supply of nutrients. Rock Dust, although technically not a fertiliser (as it does not contain sufficient amounts of Nitrogen, Phosphorus and Potassium to be classed as such) has amazing benefits in the form of all the essential trace elements and minerals in the dust. Trace elements are often ignored by gardeners, as their importance is not over-stated, however they should not be. Trace elements are vitally important to plant life, growth, viability, sustainability and yield.


Top Dressing
Volcanic Rock Dust is found to benefit all types and pH of soil and promote plant growth and vigour. It can be applied at any time of year and at any stage of plant growth. The only exception to this is when the ground is frozen and soil cannot be penetrated, or in high winds. Simply sprinkle evenly onto soil from the edge of a spade or trowel and then rake in, or let worms and weather do this for you.
Minimum Annual Dose
Apply 0.5kg per square metre, or in gardener’s terms “a handful a yard”. A 10kg bag supplies 20 square metres. This annual dose has also been seen to benefit lawns.
Booster Dose
Apply 2kg per square metre to give your soil a boost.
Top Dressing for Large Areas
Volcanic Rock Dust can be applied to fields and parks, whether grass land or cultivated using a Lime Spreader. Fertiliser Spinners can also be used but care has to be taken to prevent it sticking to the sides of the spinner. Salt Spreaders with a Heavy Duty Agitator are also suitable.
0.5kg per square meter = 2 tonnes per acre
2kg per square metre = 8 tonnes per acre
Compost Improver
Mix 2kg through 50 litres of compost. Ideal if you mix in wheelbarrow or trug. A good handful mixed through a bucket of compost works well.
Compost Activator and Accelerator
When adding a new layer of compost to your compost bin or pile, add a sufficient amount of rock dust to make a light covering over the surface and can easily see through. Gardening material is found to break down into compost faster, reaching a higher temperature and odours are found to be reduced.
Tonic for Wormeries
Sprinkle a small handful per 30cm2 (1ft2) onto surface of your wormery every month. Try a small area with this amount and see the worms congregate and enjoy it!

Further Info:

Mixing with Other Plant Foods
Volcanic Rock Dust has been shown to work well with soil conditioners, animal manures and plant foods. Whilst lime can still be used to raise the pH of acid soils, we do not recommend adding it at the same time as volcanic rock dust as this reduces the effectiveness of both materials. Leave at least two weeks between both applications.
Quality Control
This is a natural product and, as such, moisture content may vary however this will not affect the quality.
Please Note:
To offer the best possible value, smaller weight bags are repackaged into clear packaging with a black and white label with all relevant information and application rates detailed and larger quantities will be supplied in manufacturer’s bags. Tubs will be plain white with a black and white label with all relevant information and application rates detailed. Images shown are for illustrative purposes only.
Storage & Safety Advice
Store in a dry place or under cover if stored outside. Do not apply in windy conditions.
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About Elixir Gardens

For over 30 years Elixir Garden Supplies have been providing gardeners with all the essentials they need to achieve growing.

Our online store makes sure that all our customers have access to the information they need to make the right decisions when choosing the products they need for their gardens. We know from experience that gardening means many different things to our customers. Whether you have a balcony, patio, lawn or allotment, Elixir Gardens are proud to supply both amateur and professional gardeners alike.

We regularly use our many years of experience to developed our exclusive formulations in specialist fertilisers. Many of these have stood the test of time and have become firm favourites with amateurs and professionals alike.  In fact our knowledge of fertilisers, feeds and garden care is well known within gardening circles. But don’t just take our word for it, why not check out the thousands of fantastic reviews on Trust Pilot.

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About Elixir Gardens

With over 35 years’ experience in Gardening and Horticulture here at Elixir Garden Supplies we pride ourselves on offering quality gardening essentials with the knowledge of how to use them and sold at the best possible prices.

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