Onnu Biochar
Multi-purpose Biochar Compost Mix
Multi-purpose Biochar Compost Mix
Our pre-mixed biochar and premium multi-purpose compost is a great way to easily apply biochar to your garden, raised beds, flower beds or potting mixes. Use like you would with ordinary compost and get the long-term benefits of biochar.
Biochar (20%) and Compost (80%) blend
Our Multi-Purpose Biochar Compost Mix is the ideal product for those looking to enrich their soil with an added boost of nutrients while benefiting from the nutrient retention and soil structure improvement that biochar provides. This blend of 20% biochar and 80% compost is carefully curated to provide a balanced growing medium that sustains plant and overall soil health over time.
The biochar component, derived from the pyrolysis of sustainable waste wood, enhances nutrient retention in the soil while creating an ideal habitat for beneficial microbes. This sustainable, eco-friendly alternative to chemical fertilisers works in harmony with the premium compost, which supplies rich organic matter that decomposes to release essential nutrients, promoting robust root development and overall plant vitality. Together, these components enrich the soil with organic nutrients, sustaining a balanced nutrient cycle that allows nutrients to be absorbed and gradually released to plants, reducing leaching and supporting long-term soil health.
Key features
The biochar is mixed with premium compost made from coir, vermiculite and organic fertiliser.
- Nutrient Retention – The biochar component holds nutrients within the soil, gradually releasing them to plants and reducing nutrient loss through leaching.
- Water Retention – This mix retains moisture effectively, supporting plant hydration and reducing the frequency of watering needed.
- Enhanced Soil Structure – Biochar and compost together improve soil aeration, prevent compaction, and foster robust root growth by creating a loose, friable texture.
- Microbial Support – Biochar provides a habitat for beneficial microorganisms, while compost introduces them, supporting a healthy soil ecosystem.
- Organic Matter Enrichment – The compost component supplies organic material that decomposes, adding essential nutrients that improve soil fertility.
- Balanced pH Levels – This mix helps neutralise acidic soils, creating optimal conditions for a variety of plants to thrive.
- Sustainable Nutrient Cycling – Nutrients from the compost are retained by the biochar, supporting a steady, long-term nutrient release that sustains plants over time.
Application
Pots, Containers & Hanging Baskets: Select a container with drainage holes to prevent water logging. Add a layer of grit at the bottom for better drainage, then fill with Multi-Purpose Biochar Compost mix. Plant your chosen plants, then water thoroughly to settle the compost around the roots. The biochar will help retain moisture, reducing the need for frequent watering.
Beds & Borders: Dig a hole twice the size of the plant’s root ball and partially fill with the compost mix. Place the plant in the hole, backfill with more compost, and gently compact around the base to secure it. Water well after planting to ensure roots are surrounded with moisture and nutrients.
Seedlings / Pricking Out: Once seedlings are large enough, carefully lift each by its leaves and gently loosen the roots from the soil. Replant them well-spaced in the compost mix to allow room for growth and access to nutrients.
Watering: Biochar and coir naturally retain water, so reduce watering frequency. Allow the soil to dry slightly between waterings to avoid overwatering and ensure plants have balanced moisture levels.
Postage and Packaging
Postage and packaging fees are £10.50 for each 50L bag up to 4. Above that the pallet price of £49.99 applies. Bulk bags are shipped on a pallet costing £49.99 each.
We expect to send out orders within 3 business days of receiving them, and they should arrive within 5 business days from your order.
Trade enquiries
Looking for more than 5 bulk bags? For larger orders in bulk bags or delivered loose, and to benefit from our volume discounts, please contact us via our form or email hello@onnubiochar.com.
Want to trial biochar?
Running a trial? We can advise on how to set it up so you can measure the impact of the biochar. Contact us for more information!
Biochar
Factsheet
Our factsheet is a comprehensive guide for biochar and how it works. With summaries, glossaries, property tables, product descriptions and application rates, this fully-referenced factsheet can help you familiarise yourself with the world of biochar.
Additional
Services
Biochar Implementation Plan
A tailored strategy to integrate biochar into your soil management and growing practices.
Biochar Trial Support
Personalised consultations to address your unique soil challenges and goals.
Biochar Bespoke Blends
We can make a bespoke product to match your precise requirements.