Carbon Gold Tree Soil Improver is a premium-grade biochar-based soil additive designed to boost root establishment, improve soil structure, and promote long-term tree health. Enriched with mycorrhizal fungi, seaweed, and natural nutrients, this soil improver enhances biological activity in the root zone, making it ideal for planting new trees or rejuvenating stressed specimens. The biochar acts like a sponge in the soil—improving aeration, retaining nutrients and moisture, and creating a permanent habitat for beneficial microbes.
Perfect for landscape contractors, tree planting teams, professional gardeners, and estate managers, Carbon Gold Tree Soil Improver helps reduce transplant shock, speeds up establishment, and delivers consistent performance across a range of soil types. This product is fully approved for organic use and is widely trusted by local authorities, arborists, and urban greening professionals.
Features & Benefits
Biochar-based formulation – Improves soil structure, drainage, and nutrient retention
Enriched with biology – Contains beneficial fungi and natural feed for root health
Reduces transplant shock – Supports rapid establishment of new trees and shrubs
Carbon-rich and sustainable – Permanently locks carbon into the soil
Versatile – Works in poor soils, clay, sand, and urban planting conditions
Trusted by professionals – Proven results in arboriculture and landscape planting
Applications & Application Rates
Suitable for:
Tree and shrub planting (bare root or container-grown)
Street tree pits and urban planting schemes
Landscape planting and rewilding projects
Soil remediation and improvement in stressed or compacted ground
Application Rates (per tree or planting hole):
New trees: Mix approx. 5–10 litres (2.5–5kg) of soil improver into backfill soil in the root zone
Large/mature trees: Use up to 10–15kg per planting pit for maximum benefit
Topdressing for existing trees: Apply 1–2kg around the base, rake in, and water thoroughly
For best results, combine with Carbon Gold Tree Fertiliser or apply as part of a wider tree planting programme.
Formulation & How to Apply
Formulation: Biochar blended with seaweed, wormcasts, natural minerals, and mycorrhizal fungi
Application method: Mix thoroughly with planting soil or compost in the backfill. For existing trees, lightly fork into the surface or apply as a mulch around the drip line. Water in well.
Storage: Store in a dry place. Reseal after use.

Specification Details
Product Name Carbon Gold Tree Soil Improver
Composition Biochar, seaweed, wormcasts, fungi
Form Granular soil improver
Organic Status Approved for organic use (Soil Association)
Bag Size 20kg
Application Methods Mix into backfill or topdress around roots
Application Frequency Once at planting or annually as topdress
Target Areas Tree planting, shrubs, stressed soils