Clay Buster Green Manure Seeds

GREEN MANURE Clay Breaker Mix (Autumn Cover Crop)

Botanical Name: Mixed species blend (Grasses, Legumes & Brassicas)

Designed to break up heavy clay soils, improve drainage, and rebuild soil structure.

A specialised autumn cover crop blend formulated for compacted and heavy clay soils. This mix combines deep taproot species, fibrous-root grasses, and nitrogen-fixing legumes to physically open the soil, improve aeration, and increase organic matter. Ideal for garden beds, orchards, and market gardens needing soil improvement before spring planting.

• Deep-rooted radish and turnip penetrate compacted clay and improve drainage.
• Grasses like oats and ryegrass build organic matter and stabilise soil structure.
• Legumes fix nitrogen and support beneficial soil microbes.
• Fast establishment helps suppress weeds and protect soil over winter.
• Improves soil tilth, making clay easier to work in future seasons.

What’s Inside?

A balanced mix of species selected specifically for clay soil improvement:

• Deep Root Soil Breakers: Tillage Radish, Forage Turnip
• Grasses & Biomass Builders: Oats, Annual Ryegrass
• Legumes (Nitrogen Fixers): Vetch, Crimson Clover

Plant Details:

• Plant Type: Annual autumn/winter green manure and cover crop mix
• Coverage:
  

  Broadcast rate: ~ 1 kg per 150–250 m²
  (equivalent to 40–70 kg per hectare)

  or for gardeners:

  • 100 m² needs ~400–700 g
  • 500 m² needs ~2–3.5 kg
  • 1000 m² needs ~4–7 kg

Sowing Information:

• Sow When:
  Temperate Regions: February–June or August–October
  Subtropical Regions (QLD): March–June
• Germination: 5–10 days (fast in warm soils)
• Depth: Sow 1–2 cm deep
• Position: Full sun
• Sow Where: Broadcast evenly over prepared soil and lightly rake in
• Soil Type: Particularly suited to heavy clay and compacted soils
• Spacing: Broadcast densely for best soil improvement

Management:

• Water after sowing to ensure strong germination, especially in clay soils prone to crusting.
• Allow plants to grow 6–10 weeks before cutting or incorporating.
• For maximum soil improvement, slash before flowering and leave roots in the ground.

Soil Improvement Benefits:

• Breaks Compaction: Taproots create channels through dense clay.
• Improves Drainage: Opens soil structure and reduces waterlogging.
• Builds Organic Matter: Adds biomass to improve soil texture.
• Boosts Biology: Supports microbes and earthworms.

Harvest and Incorporation:

Turn under or dig in 2–3 weeks before planting your next crop. In no-dig systems, cut and leave as a mulch layer to continue improving soil structure.

When to Sow Clay Breaker Mix in Your Climate

Quick Growing Guide