Mung Bean Seeds

Mung Bean Seeds – Green Manure & Cover Crop

Botanical Name: Vigna radiata
Also Known As: Mungbean, Green Gram, Moong
Variety: Not specified by supplier

Mung beans are a fast-growing, warm-season annual legume used for summer green manure, cover cropping and soil improvement. Suitable for vegetable gardens, market gardens and cropping rotations, they provide living soil cover and produce leafy growth that can be returned to the soil as organic material.

When roots develop effective nodules with compatible rhizobia, mung beans can fix atmospheric nitrogen. The amount retained for following crops depends on growing conditions, nodulation, biomass production and how the crop is managed.

• Warm-season legume for summer green manure and cover crops.
• Suitable for vegetable and market garden rotations.
• Produces leafy biomass and roots that contribute organic matter.
• Offers nitrogen-fixing potential with effective inoculation and nodulation.
• Helps protect exposed soil while actively growing.
• Can be included in compatible warm-season cover crop mixes.
• Best grown in full sun, warm conditions and well-drained soil.

Plant Details

• Plant Type: Warm-season annual legume
• Botanical Name: Vigna radiata
• Family: Fabaceae
• Growth Habit: Upright to semi-upright; varies by variety and conditions
• Foliage: Green, trifoliate leaves
• Flowers: Yellow to greenish-yellow
• Position: Full sun
• Soil: Well-drained soil; avoid prolonged waterlogging
• Frost Tolerance: Frost-sensitive

Best Uses for Mung Bean Cover Crop Seeds

• Green manure: Grow and terminate the crop, leaving roots and above-ground residues to return organic material to the soil.
• Summer cover cropping: Provide temporary living cover between main crops.
• Vegetable rotations: Include a warm-season legume between vegetable or market garden plantings.
• Cover crop mixtures: Combine with suitable warm-season species, adjusting each component’s sowing rate.

Nitrogen Fixation & Inoculation

Mung beans form a symbiotic relationship with compatible soil bacteria. For reliable nodulation, use Group I (mungbean/cowpea) inoculant according to the manufacturer’s label, particularly where mung beans or related crops have not been grown recently.

Apply inoculant close to sowing and protect treated seed from heat and direct sunlight. Nitrogen fixation is not guaranteed simply by sowing a legume; soil conditions and successful nodulation are important.

Sowing Information

• Season: Warm, frost-free growing period
• Soil Temperature: Preferably at least 15°C and rising, with warmer soil supporting more reliable establishment
• Sowing Depth: Approximately 3–5 cm into moist soil
• Position: Full sun
• Seedbed: Well drained, with good seed-to-soil contact
• Weed Control: Control established weeds before sowing; young mung bean plants compete poorly with weeds

Sowing Rate & Coverage

For field-grown mung beans, Australian agronomy guidance commonly targets approximately 20–30 established plants per m² in dryland conditions. The required kilograms per hectare vary with seed size, germination and field establishment. A denser cover crop may need a different rate from a grain crop, so calculate the rate for your purpose and seed lot.

The following pack coverage is an illustration only, using 25 kg/ha (2.5 g/m²). It is not a fixed recommendation for every seed lot or growing situation.

When to Sow Mung Beans in Australia

Subtropical regions: Sow during warm spring and summer conditions after frost risk has passed, with sufficient soil moisture for establishment.

Temperate regions: Sow during the reliably warm part of the season and allow enough frost-free time for useful growth before termination.

Tropical regions: Time sowing around suitable rainfall and drainage conditions. Avoid periods likely to cause prolonged waterlogging.

Local sowing windows vary with climate, rainfall and irrigation availability.

How to Sow Mung Bean Seeds

1. Choose a sunny, well-drained site and control existing weeds.
2. Check the seed lot’s germination and seed size to calculate the sowing rate.
3. Prepare a seedbed with good seed-to-soil contact.
4. Apply Group I inoculant as directed on its label.
5. Drill into moisture at approximately 3–5 cm depth. For smaller plots, sow in furrows and cover evenly.
6. Maintain adequate moisture for establishment without waterlogging the soil.

When to Terminate Mung Beans for Green Manure

For green manure, plan termination around early flowering and before mature seed forms, adjusting to biomass growth, available soil moisture and the next crop’s planting date. This reduces the risk of unwanted volunteer plants.

Chop and incorporate the crop, or terminate it and retain residues as surface mulch. Slashing alone may allow regrowth, so inspect the crop and use an effective termination method. Allow suitable time for residues to decompose before establishing the following crop.

Crop Management

• Control weeds early, particularly during establishment.
• Monitor for insect pests, disease and poor nodulation.
• Avoid waterlogging and manage irrigation according to soil conditions.
• Terminate before the cover crop uses moisture needed by the next planting.
• Prevent mature seed formation if volunteers would be undesirable.

Are Mung Beans Suitable for Pasture?

Mung beans are primarily offered here as a summer green manure and cover crop. They may have forage uses in suitable systems, but are not a permanent pasture grass or long-lived pasture legume. Where grazing or fodder production is the main goal, seek crop-specific livestock and agronomic advice.