Review summary card
- Product: SoilFixer SF60 (Biochar Super Compost / Soil Improver)
- Brand / manufacturer: SoilFixer
- Type: Specialist soil improver (MPC-adjacent; not a mainstream multipurpose growing media)
- Core component: Activated biochar blended with composted organic inputs (manufacturer describes ~20% biochar)
- Score (Balanced Scorecard): 7.4 / 10
- Best use: Soil improvement in beds/borders; rejuvenating tired soil; blending into potting mixes as an amendment
- View product: https://www.soilfixer.co.uk/product/soilfixer-sf60/
At-a-glance rating breakdown
| Category | Weight | Score | Notes |
| Ease of use | 40% | 7.4 | Intended as a blend-in soil improver rather than a full growing medium. |
| Composition & quality | 35% | 7.4 | Biochar + composted organics; positioned for long-term soil benefit. |
| Sustainability | 25% | 7.4 | Peat-free, biochar-based positioning; verify claims on current pack/spec. |
| Overall (weighted) | 100% | 7.4 / 10 | Higher-scoring specialist within the v9.2e set. |
Contextual use modifiers
SF60 should be treated as a targeted soil improver, not a conventional “fill the pot” multipurpose compost. It is best used as a percentage blend into soil or existing mixes when the goal is improving soil behaviour (water holding, nutrient buffering, biology support).
Strengths & limitations
What we liked
- Clear specialist intent: soil improvement rather than generic multipurpose use.
- Biochar component is positioned to improve buffering and longer-term behaviour.
Points to consider
- Not a drop-in replacement for standard multipurpose compost in all container scenarios.
- Application rate and method matter more than with generic MPC.
Material & sustainability notes
| Attribute | Detail |
| Feedstock | Activated biochar plus composted organic inputs (manufacturer describes a biochar-based super compost) |
| PAS100 / certification | Not assessed in this review |
| Peat content | 0% (peat-free positioning) |
| Recycled / local inputs | Not assessed in this review |
| Circularity comment | Designed as a soil improver using biochar and composted organics. |
Summary: A higher-scoring specialist soil improver—most valuable when used as an amendment for soil behaviour, not as a generic growing medium.
Typical user fit
| User type | Fit rating | Why |
| Soil improver / bed builder | High | Designed for improving tired or low-function soils. |
| Experienced container grower | Medium | Works well as an amendment; not necessarily a full medium. |
| Casual gardener | Medium | Needs simple guidance on blend rate and expectation. |
Positioning
- MPC-adjacent specialist.
- “Soil improvement” intent, not “one bag does everything.”
Our conclusion
Overall impression: SF60 is best treated as a specialist, blend-in soil improver. It offers stronger long-term intent than mainstream MPCs, but requires the gardener to apply it with purpose.
Ideal for / not ideal for / consumer tip
- Ideal for: Improving tired beds/borders; boosting mixes; long-term soil function focus.
- Not ideal for: Replacing standard MPC as a single, universal growing medium without adjustment.
- Consumer tip: Use as an amendment—mix into the root zone or into existing compost rather than using alone.
