How to Grow Moth Beans USA | Complete Growing Guide

Moth Bean (Vigna aconitifolia)

Whole and split moth bean seeds on a white plate. Photo: Lalitstar at English Wikipedia, CC BY-SA 3.0, via Wikimedia Commons.

2 sources cited

The short answer

Ready in: 75–90 days
Site: soil pH 6.5–7.5

In the UK, moth beans are ready to harvest 75–90 days after planting.

Moth beans (Vigna aconitifolia) — Frost-tender annual.

Quick Facts

Whole and split moth bean seeds on a white plate — “Matki” by Lalitstar at English Wikipedia is licensed under CC BY-SA 3.0. Source: Wikimedia Commons — “Matki” by Lalitstar at English Wikipedia is licensed under CC BY-SA 3.0. Source: Wikimedia Commons.

Factor	Value
Soil pH	6.5 - 7.5
Optimal growing temp	24-32C
Time to harvest	75-90 days
Soil texture	Particularly suitable for dry light sandy soils; will not tolerate waterlogging
Drainage	Free-draining
Lifecycle	Frost-tender annual; the most drought-resistant pulse crop known.

Soil & Growing Conditions

Moth bean plants trailing over stony red soil — “Vigna aconitifolia” by Siddarth Machado is licensed under CC BY 4.0. Source: iNaturalist — “Vigna aconitifolia” by Siddarth Machado is licensed under CC BY 4.0. Source: iNaturalist.

Water: Very low; the most drought-resistant pulse crop, succeeds on 200-300 mm

Soil pH range

6.5 7.5

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

Harvest & Storage

A moth bean flower and slender pod on sandy ground — “Vigna aconitifolia” by Aravinth is licensed under CC BY 4.0. Source: iNaturalist — “Vigna aconitifolia” by Aravinth is licensed under CC BY 4.0. Source: iNaturalist.

When to pick: Pods dry on the trailing stems; the whole plant is often cut once the majority have matured.

Moth bean through the season

Matki

Small brown seeds, whole and split. Sprouted they become the matki of Maharashtrian cooking.

A young moth bean plant with rounded first leaves — “Vigna aconitifolia” by Aravinth is licensed under CC BY 4.0. Source: iNaturalist — “Vigna aconitifolia” by Aravinth is licensed under CC BY 4.0. Source: iNaturalist.

Establishing

A slender, hairy annual reaching only about 40 cm, but trailing to 150 cm.

The deeply lobed leaflets of moth bean covering dry ground — “Vigna aconitifolia” by Siddarth Machado is licensed under CC BY 4.0. Source: iNaturalist — “Vigna aconitifolia” by Siddarth Machado is licensed under CC BY 4.0. Source: iNaturalist.

The leaf

Deeply lobed leaflets, unlike anything else in this group, and the source of the older name Phaseolus aconitifolius.

A yellow moth bean flower low among the foliage — “Vigna aconitifolia” by Siddarth Machado is licensed under CC BY 4.0. Source: iNaturalist — “Vigna aconitifolia” by Siddarth Machado is licensed under CC BY 4.0. Source: iNaturalist.

In flower

Small yellow papilionaceous flowers held low in the canopy.

Close-up of the small yellow flower of moth bean — “Vigna aconitifolia” by Aravinth is licensed under CC BY 4.0. Source: iNaturalist — “Vigna aconitifolia” by Aravinth is licensed under CC BY 4.0. Source: iNaturalist.

Flower detail

A quantitative short-day plant, though day-neutral types are known.

Pod set

Cylindrical pods 2.5-5 cm long with 4-9 seeds. Maturity comes 75-90 days after sowing.

Its own ground

Trailing over dry, light, stony soil. PROTA calls it the most drought-resistant pulse crop there is.

A pressed herbarium specimen of Vigna aconitifolia — “Vigna aconitifolia (Jacq.) Maréchal” by A. Pappi is licensed under CC0. Source: Smithsonian NMNH — “Vigna aconitifolia (Jacq.) Maréchal” by A. Pappi is licensed under CC0. Source: Smithsonian NMNH.

For identification

A pressed specimen showing the whole plant, useful for telling moth bean from the other small Vigna pulses.

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 moth beans take to grow?

Typically 75–90 days, depending on cultivar and growing conditions.

What soil pH do moth beans need?

A pH of about 6.5–7.5. 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.

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How to Grow Moth Beans USA | Complete Growing Guide

Moth Bean (Vigna aconitifolia)

Quick Facts

Soil & Growing Conditions

Harvest & Storage

Moth bean through the season

References

Frequently Asked Questions

Where To Go From Here

Plan the next step

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How to Grow Moth Beans USA | Complete Growing Guide

Moth Bean (Vigna aconitifolia)

Quick Facts

Soil & Growing Conditions

Harvest & Storage

Moth bean through the season

References

Frequently Asked Questions

Where To Go From Here

Plan your veg garden before you dig a single inch

Plan the next step