Carbon Gold Tree Soil Improver 20kg/45L

Carbon Gold Tree Soil Improver 20kg/45L is a premium biochar-based soil additive designed to enhance tree and shrub establishment, improve soil structure, and promote long-term plant health. Enriched with beneficial mycorrhizal fungi, seaweed extracts, and natural minerals, this unique formulation boosts biological activity in the root zone, improving nutrient and water retention, aeration, and soil resilience.

The biochar component acts like a sponge in the soil, providing a permanent habitat for microbes while locking carbon into the ground. This creates healthier, more robust roots and reduces transplant shock, allowing newly planted trees and shrubs to establish quickly. Perfect for professional landscapers, arborists, tree planting teams, and estate managers, Carbon Gold Tree Soil Improver is suitable for a wide range of soils—including clay, sandy, or urban-compacted ground—and is fully approved for organic use.

Use it as part of a complete tree planting programme or in combination with Carbon Gold Tree Fertiliser for maximum performance. Trusted by councils, arboriculture professionals, and urban greening teams, it delivers consistent, long-lasting results across both new plantings and established trees.

Features & Benefits

• Biochar-based formulation improves soil structure, aeration, and nutrient retention

• Enriched with mycorrhizal fungi and natural nutrients to support root health

• Reduces transplant shock and accelerates establishment

• Locks carbon into soil, supporting sustainability and soil biology

• Versatile and effective in poor soils, clay, sandy, or urban planting sites

• Proven results in arboriculture, landscape planting, and rewilding projects

• Fully approved for organic use

Applications

• Tree and shrub planting (bare root or container-grown)

• Street tree pits and urban landscaping schemes

• Large-scale landscape and rewilding projects

• Soil remediation and improvement of stressed or compacted soils

• Topdressing for existing trees to boost root zone biology

Application Rates

• New Trees: Mix 5–10 litres (2.5–5kg) into backfill soil per planting hole

• Large/Mature Trees: 10–15kg per planting pit for maximum benefit

• Topdressing Existing Trees: Apply 1–2kg around the base, rake in, and water thoroughly

How to Apply:
Mix thoroughly into planting backfill for new trees or lightly fork into soil around existing trees. Water well after application. Combine with Carbon Gold Tree Fertiliser for enhanced results.

Best Application Period:
During planting or as part of a soil improvement programme. Suitable for use all year round, avoiding frozen ground.

Technical Specification

Product Type | Tree soil improver

Composition | Biochar, seaweed, wormcasts, mycorrhizal fungi, natural minerals

Form | Granular soil improver

Organic Status | Approved for organic use (Soil Association)

Bag Size | 20kg / 45L

Application Methods | Mix into planting backfill or topdress around existing roots

Recommended Rates | New trees: 5–10L (2.5–5kg); large trees: 10–15kg; topdressing: 1–2kg

Target Uses | Tree and shrub planting, street tree pits, urban landscaping, soil remediation

Packaging Note | Packaging may vary; product specification remains unchanged