Organic Matter Summer Mix Green Manure Seeds

GREEN MANURE Organic Matter Summer Mix

Botanical Names: Millet, Cowpea (Vigna unguiculata), Lablab (Lablab purpureus), Buckwheat (Fagopyrum esculentum), Sunn Hemp (Crotalaria juncea), Brassica (e.g. forage rape), Tillage Radish (Raphanus sativus var. longipinnatus), Clover (Trifolium spp.), Butterfly Pea (Clitoria ternatea)

Organic Matter Summer Mix is a purpose-built warm-season green manure blend designed to rapidly increase soil organic matter and boost nitrogen levels. The multi-species combination pairs fast-growing grasses and broadleaves with several nitrogen-fixing legumes and deep-rooted brassicas/tillage radish to build biomass, improve soil structure, and stimulate microbial activity. Ideal as a summer cover crop, green manure or forage option for gardens, paddocks and broadacre rotations.

• Designed to increase soil nitrogen and organic matter using multiple legumes (Cowpea, Lablab, Clover, Butterfly Pea, Sunn Hemp).
• Fast biomass producers (Millet, Buckwheat, Sunn Hemp) rapidly add carbon and smother weeds.
• Deep-rooted Brassica and Tillage Radish break compaction, improve drainage and recycle nutrients.
• Diverse root architectures and plant types boost microbial diversity and long-term soil health.
• Attracts pollinators (Buckwheat, Butterfly Pea) and supports beneficial insects.
• Suitable for chop-and-incorporate green manure, mulch / chop-and-drop, or managed forage.

Plant Details:

• Mix Type: Multi-species warm-season green manure & soil conditioner
• Key Functions: Nitrogen fixation (legumes), organic matter addition (grasses & broadleaves), soil decompaction (radish & brassica)
• Uses: Green manure, cover crop, forage, fallow improvement, compaction relief

Sowing Information (General guidance for the mix):

• Sow When:
  Temperate Regions: Late spring–early summer (October–December).
  Subtropical Regions: Spring–early summer (September–November).
  Tropical Regions: Early wet season (November–January).
• Germination: 3–14 days (fastest: Buckwheat, Millet; legumes 5–14 days)
• Depth: 0.5–2 cm for small seeds (clover, buckwheat), 1–3 cm for larger seeds (millet, sunn hemp, radish)
• Position: Full sun to light shade; full sun gives maximum biomass
• Sow Where: Direct into prepared beds, paddocks, fallow blocks or between rotations
• Soil Type: Tolerant of a wide range; prefers well-drained soils. Adjust pH for sensitive species if needed.
• Mixing & Rate: Balance legumes and biomass species to match your goal — e.g. 30% Millet/Buckwheat, 35% Legumes (Cowpea/Lablab/Clover/Butterfly Pea/Sunn Hemp), 20% Brassica/Radish, 15% filler for pollinator plants. Adjust by weight as required.

Management:

• Maintain even moisture during establishment; irrigate in dry conditions to ensure rapid canopy closure.
• Monitor flowering — incorporate legumes at early bloom to maximise nitrogen transfer and avoid heavy reseeding.
• Cut or graze carefully if using for forage; avoid overgrazing to preserve ground cover and root systems.
• Tillage Radish and Brassica residues break down quickly; allow 2–6 weeks decomposition before sensitive transplants.

Harvest and Incorporation:

For green manure, mow or flail when the majority of species reach early to mid-flower (or when biomass is maximised). Chop-and-incorporate by shallow tilling or leave as surface mulch. Decomposition time varies with climate — typically 2–6 weeks; allow adequate time before planting your next crop.

When to Sow Organic Matter Summer Mix in Your Climate

Quick Growing Guide