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How to Grow Mung Beans USA | Full-Season Growing Guide

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Mung Bean (Vigna radiata)

A whole mung bean plant showing its trifoliolate leaves against a plain background. Photo: Bff, CC BY-SA 4.0, via Wikimedia Commons.

Also known as: Green Gram · 2 sources cited

The short answer

Ready in
50–120 days
Site
soil pH 5.5–7

In the UK, mung beans are ready to harvest 50–120 days after planting.

Mung beans (Vigna radiata) — Frost-tender annual.

Quick Facts

Pale yellow mung bean flowers alongside developing green pods — “Hoa đậu xanh” by Bùi Thụy Đào Nguyên is licensed under CC BY-SA 3.0. Source: Wikimedia Commons
“Hoa đậu xanh” by Bùi Thụy Đào Nguyên is licensed under CC BY-SA 3.0. Source: Wikimedia Commons.
Factor Value
Soil pH 5.5 - 7
Optimal growing temp 28-30C
Time to harvest 50-120 days
Soil texture Well-drained loams or sandy loams
Drainage Well-drained
Lifecycle Frost-tender annual. Completes its cycle in one warm season and is killed by the first frost.

Soil & Growing Conditions

A stand of mung bean plants growing in a garden bed — “JfSanVicente9088SanMiguelfvf 20” by Judgefloro is licensed under CC BY-SA 4.0. Source: Wikimedia Commons
“JfSanVicente9088SanMiguelfvf 20” by Judgefloro is licensed under CC BY-SA 4.0. Source: Wikimedia Commons.

Water: Moderate; 600-1000 mm annual rainfall, tolerates less

Soil pH range

5.5 7

Span reflects genuine variation between the cited authorities, not a single agreed figure.

Harvest & Storage

Mature mung bean pods held on the plant, ready for harvest — “Mungbohne mit Fruchtstand” by M97995619 is licensed under CC BY-SA 3.0. Source: Wikimedia Commons
“Mungbohne mit Fruchtstand” by M97995619 is licensed under CC BY-SA 3.0. Source: Wikimedia Commons.

When to pick: Pods turn black or brown and dry; harvest before they shatter. Flowering starts 30-70 days after sowing and pods mature 3-4 weeks after flowering.

References

2 independent sources are cited for this crop. Where they disagree - soil pH is the clearest case - every figure is preserved rather than averaged into false precision.

Frequently Asked Questions

How long do mung beans take to grow?

Typically 50–120 days, depending on cultivar and growing conditions.

What soil pH do mung beans need?

A pH of about 5.5–7. That span reflects genuine variation between the authorities we cite rather than a single agreed figure — the References section lists each source's exact range.

Plan next season before the problems start

Almost everything on this page resolves to your own frost dates rather than the calendar — the last spring frost moves by roughly two months between zone 3 and zone 10. The USA Garden Planner works from your zone so the timing is already decided before the season starts.

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SoilCommander Editorial Team

US vegetable growing guides · Adapted for USDA hardiness zones and US frost dates

Every SoilCommander guide is written and maintained by our editorial team for real US growing conditions, adapted to USDA hardiness zones and US frost-date data, with Cooperative Extension growing advice cited directly where a crop-specific source exists.

Vegetable Growing Guides USA

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