Moth bean is a drought tolerant Indian legume and a genuine arid zone crop, per the crop database's own description, and it sprouts well -- a real dual-use bean, valued for both dried storage and fresh sprouting. Native to some of South Asia's driest agricultural regions, it's self-pollinating with low outcrossing and doesn't cross with common bean, cowpea, mung bean or the other legumes on this site.
Water need
Genuinely extreme drought tolerance per the crop database -- one of the most water-frugal legumes on this entire site.
Calories at a glance
3,390 kcal/kg dried -- a genuine calorie staple, in the same league as the site's other dried pulses (scale is log-based across all 55 core crops in the calculator).
Temperature Range by Month
Month on the bottom, temperature up the side. The pale green background is what the plant can survive at all -- fatal above or below it, labelled directly on the chart where that applies to your zone. The coral band is its ideal range, and only fades in during the months this zone would actually have the crop in the ground -- reusing the exact same sowing/harvesting data as the calendar further down the page. The blue line is real monthly climate data (not a modelled estimate) for a representative rural/agricultural location in this zone -- a small farming town or agricultural research station rather than a major city, to avoid the warmer bias city weather stations have. For the actual verdict on how well this crop does in your zone, see the badge at the top of the page -- that's based on the site's own researched yield figures, not this chart.
Quick Start: Sowing to Drying
- Sow direct once the soil is warm. Sow seed direct after the soil has genuinely warmed -- moth bean is a true warm-season, arid-zone crop and germinates poorly in cold ground.
- Water sparingly. Give moth bean far less water than most other beans -- its extreme drought tolerance means it's genuinely happiest on minimal irrigation.
- Let the low, sprawling plants spread. Give the naturally low, sprawling growth habit room to spread rather than training it upright.
- Leave most pods to dry fully. For dried storage, leave the bulk of the pods on the plant until they dry and darken, rather than picking them young.
- Shell and finish drying indoors. Shell the dried pods and spread the small beans somewhere warm and airy for a final week of drying before storing in an airtight container.
Sowing & Harvesting Calendar
Pick your zone under "Temperature Range by Month" above and this updates too. Maritime, Boreal and Alpine show no window at all, since this site's own yield data marks moth bean as not viable in those zones.
Calories & Yield
Moth bean is a genuine calorie staple when dried at about 3,390 kcal per kg -- Tropical, Subtropical, Mediterranean and Arid zones tie for the best yield here, and it's not viable at all in Maritime, Boreal or Alpine zones.
| Climate Zone | Yield per plant | Calories per plant | Viability |
|---|---|---|---|
| Tropical / Humid | 1.5 kg | 5085 kcal | Viable -- best yield |
| Subtropical | 1.5 kg | 5085 kcal | Viable -- best yield |
| Mediterranean | 1.5 kg | 5085 kcal | Viable -- best yield |
| Temperate Maritime | -- | -- | Not viable |
| Temperate Continental | 0.6 kg | 2034 kcal | Challenging (60% yield) |
| Cool / Boreal | -- | -- | Not viable |
| Arid / Semi-Arid | 1.5 kg | 5085 kcal | Viable -- best yield |
| Highland / Alpine | -- | -- | Not viable |
Figures per plant sown, dried weight, from the site's own crop database. Continental already reflects the 60% penalty applied to challenging zones.
A note on varieties: moth bean is mostly grown as regional landrace populations rather than widely marketed named cultivars -- real, verifiable named-variety diversity for home growers is genuinely thin.
Seed Saving -- Quick Guide
Moth bean is a self-pollinating Vigna species with very low crossing risk -- and it doesn't cross with mung bean, adzuki or black gram either, despite the shared genus.
SERVINGS, NOT DAILY CALORIES This works out plate-sized servings of moth bean from your seed during its fresh harvest window only, not your group's full daily calorie needs. For that, use the main calculator.
Estimated for your selected zone above, using this site's own germination, loss and yield figures for moth bean -- a helping is roughly what you'd put on a plate as part of a meal with other veg. Treat it as a planning estimate, not a promise.
Storage & Preservation
Moth bean is grown here specifically for dried storage, though the crop database notes it also sprouts well -- pods left to dry fully are shelled and given a final week of airing indoors before going into an airtight container.
Stored this way in a cool, dry place, dried moth bean keeps for a genuinely long time -- years rather than months, the same storage league as this site's other dried pulses. A separate small stash can be kept back specifically for sprouting rather than dry storage.
Growing Moth Bean Without Bought Inputs
Moth bean's genuine extreme drought tolerance is itself the biggest input-free advantage here -- bred for some of South Asia's driest growing regions, it needs little to no supplemental watering once established.
Aphids and pod-boring caterpillars are the main pests to watch for -- hand-picking or a strong water spray usually keeps light infestations in check without spraying.
Moth bean fixes its own nitrogen via bacteria in root nodules, genuinely improving the soil for whatever's grown there next -- factor that into a wider rotation plan, not just a calorie one.
Frequently Asked Questions
How drought tolerant is moth bean?
Genuinely extreme -- the crop database describes it directly as a drought tolerant Indian legume and an arid zone crop. Moth bean is native to some of South Asia's driest agricultural regions and is grown there specifically because it copes with far less water than most other pulses.
Can moth bean be sprouted, not just dried?
Yes -- the crop database notes it sprouts well, and moth bean sprouts are a genuine, widely eaten food in their own right across South Asia, offering a fresh-food option alongside the dried-storage use covered on this page.
Why isn't moth bean viable in Maritime zones on this site?
Moth bean is a genuine arid-zone crop bred for heat and dryness, and a cool, damp Maritime growing season is close to the opposite of what it needs -- the crop database's own zone data marks it not viable there.