Biochar SF40 Multi-Putpose Compost
SoilFixer’s Biochar Multi-Purpose Compost (SF40) is a premium, peat-free blend comprising 20% biochar and 80% high-quality, sustainable compost. This ready-to-use mix enhances soil structure, water retention, and nutrient availability, making it ideal for organic gardening. The biochar component supports beneficial microbial activity, fostering healthier root systems and improved plant resilience. Suitable for a variety of applications, including planters, raised beds, allotments, and general garden use, SF40 offers a sustainable solution for enriching soil fertility.
If you need large-quantity loose loads (e.g. 10–20 tonnes), please contact us.
A ready-to-use multi-purpose compost
A ready-to-use multi-purpose compost used as a general plant growing media for containers, potting on, and raised beds. It is also the go-to biochar-compost grade for improving topsoil and converting soil into Terra Preta type soil.
SF40 Multi-Purpose Compost Features
- Peat free
- Coir free
- Contains 20% biochar and 80% sustainable, local, great-quality compost
- Ideal for organic growing (our compost has no added chemicals)
- Made in Surrey, UK from 100% clean plant and wood sources, all sustainably sourced
What Is It Used For and How?
Incorporating into Soil
- New Beds or Containers: Mix compost thoroughly into the top few inches of soil before planting.
- Established Beds: Loosen the soil gently and work the compost into the top 6–8 inches.
- Recommended Ratios: Aim for a 20–30% compost-to-soil mix by volume.
Top Dressing
- Around Existing Plants: Apply a ½ to 1-inch layer of compost around the base of plants, extending out to the drip line.
- Lawns: Spread a light, even ½-inch layer of finely sifted compost across the lawn surface to support healthy growth.
Potting Mixes
- Mixing: Combine compost with standard potting soil to create a nutrient-rich, water-retentive medium.
- Ratios: Start with a 20–50% compost blend, adjusting based on plant needs and soil texture.
- Water Balance: Compost boosts moisture retention—ideal for sandy soils. Be cautious in mixes with high clay content to maintain aeration.
It is ready to use straight away – add to containers and plant your plants.
For soil improvement – dig or rake into your soil.
Benefits
- Ideal for growing plants and vegetables
- Biochar-humus matrix provides excellent water retention
- Contains slow-release macro-nutrients (NKP)
- Contains trace plant micro-nutrients (Ca, Mg, etc.)
- Improves nutrient supply to plant roots (via microbial/fungal root associations e.g. mycorrhizal fungi, AMF)
- Improves soil aggregation, leading to better tilth and aeration (essential for oxygen flow to roots and microbes)
Pack Sizes
- 10 kg sack (approx. 20 litres)
- 20 kg sack (approx. 40 litres)
- 0.5 m³ and 1 m³ bulk bags
- For bulk loose orders, please email: help@soilfixer.co.uk
Delivery
48 hours (except over weekends)
FAQs
What can I use SF40 for? SF40 is a true multi-purpose compost suitable for pots, containers, raised beds, borders, seed sowing and potting on. It replaces standard multi-purpose compost in any application.
Is SF40 suitable for seeds and seedlings? Yes, SF40 is fine-textured and suitable for seed sowing and young plants. Its water-retention properties help prevent seedlings drying out.
How is SF40 different from SF60? SF40 is a multi-purpose compost replacement for everyday gardening use. SF60 is a high-performance soil improver with a higher biochar content, designed for maximum soil transformation.
Is SF40 peat-free? Yes, SF40 is 100% peat-free, sustainable and carbon-negative. A direct replacement for traditional peat-based multi-purpose composts.
How much SF40 do I need for a raised bed? For a standard 1.2m x 2.4m raised bed at 30cm depth, you’ll need approximately 85 litres. Contact us for large orders for the best price.
