How to Grow Tepary Beans | Complete Growing Guide

Tepary Bean (Phaseolus acutifolius)

Young cultivated tepary bean plants growing in a garden bed. Photo: Eileen M. Kane, CC BY 2.0, via Flickr.

2 sources cited

The short answer

Ready in: 70–90 days
Site: soil pH 5–7

In the UK, tepary beans are ready to harvest 70–90 days after planting.

Tepary beans (Phaseolus acutifolius) — Frost-tender annual.

Quick Facts

Young cultivated tepary bean plants growing in a garden bed — “Campus White Tepary Bean, planted August 6.” by Eileen M. Kane is licensed under CC BY 2.0. Source: Flickr — “Campus White Tepary Bean, planted August 6.” by Eileen M. Kane is licensed under CC BY 2.0. Source: Flickr.

Factor	Value
Soil pH	5 - 7
Time to harvest	70-90 days
Soil texture	Light, well-drained soils preferred; heavy clays unsuitable
Drainage	Free-draining; does not tolerate waterlogging
Lifecycle	Frost-tender annual; among the most heat- and drought-tolerant beans, with a short 70-90 day season.

Soil & Growing Conditions

Desert scrub in New Mexico, the native habitat of tepary bean — “Northern edge of Aden Malpais - Flickr - aspidoscelis” by Patrick Alexander from Las Cruces, NM is licensed under CC0. Source: Wikimedia Commons — “Northern edge of Aden Malpais - Flickr - aspidoscelis” by Patrick Alexander from Las Cruces, NM is licensed under CC0. Source: Wikimedia Commons.

Water: Very low; tolerant of drought, heat and a dry atmosphere

Soil pH range

5 7

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

Harvest & Storage

A green pod of wild tepary bean among desert stones — “Phaseolus acutifolius tenuifolius 25462116” by Alex Abair is licensed under CC BY 4.0. Source: Wikimedia Commons — “Phaseolus acutifolius tenuifolius 25462116” by Alex Abair is licensed under CC BY 4.0. Source: Wikimedia Commons.

When to pick: PROTA: short-duration types may mature within 2 months, but most have a growth period of 70-90 days, averaging 120 days in cooler regions. Pods are left to dry on the plant.

Tepary bean, cultivated and wild

The cultivated crop

A white tepary bean sown in a garden bed. Most types have a growth period of 70-90 days.

Seedling

First true leaves. Tepary is frost-tender and the night minimum must not fall below 8C.

A pink flower of wild tepary bean, Phaseolus acutifolius var. tenuifolius — “Phaseolus acutifolius tenuifolius 25462087” by Alex Abair is licensed under CC BY 4.0. Source: Wikimedia Commons — “Phaseolus acutifolius tenuifolius 25462087” by Alex Abair is licensed under CC BY 4.0. Source: Wikimedia Commons.

The flower

Shown here on the WILD variety, var. tenuifolius, from which the crop was domesticated about 2,300 years ago. Flowers are white, pink or pale lilac.

A pale pink wild tepary bean flower on a slender stem — “Phaseolus acutifolius tenuifolius 11963008” by Alex Abair is licensed under CC BY 4.0. Source: Wikimedia Commons — “Phaseolus acutifolius tenuifolius 11963008” by Alex Abair is licensed under CC BY 4.0. Source: Wikimedia Commons.

Flower detail

Also the wild variety. Cultivated tepary flowers are the same form, on a bushier plant.

Leaves

Wild var. tenuifolius has notably narrow leaflets; the cultivated form is broader, 4-8 cm by 2-5 cm.

Pod

Wild variety. The cultivated pod is compressed, straight or slightly curved, 5-9 cm long with 2-9 seeds.

Wild tepary bean pods ripening over stony desert ground — “Phaseolus acutifolius tenuifolius 25462102” by Alex Abair is licensed under CC BY 4.0. Source: Wikimedia Commons — “Phaseolus acutifolius tenuifolius 25462102” by Alex Abair is licensed under CC BY 4.0. Source: Wikimedia Commons.

Ripening on stony ground

Wild variety, on the sharp drainage the crop needs. Heavy clays are unsuitable and waterlogging is not tolerated.

Where it comes from

Desert scrub in New Mexico. This is the climate the crop is adapted to, and it explains the rest of the guide.

Open desert country where wild tepary bean grows — “Northern Aden Malpais - Flickr - aspidoscelis” by Patrick Alexander from Las Cruces, NM is licensed under CC0. Source: Wikimedia Commons — “Northern Aden Malpais - Flickr - aspidoscelis” by Patrick Alexander from Las Cruces, NM is licensed under CC0. Source: Wikimedia Commons.

Its native range

Wild populations run from Arizona to Guatemala. Above 1000 mm of rain the plant runs to leaf instead of pod.

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 tepary beans take to grow?

Typically 70–90 days, depending on cultivar and growing conditions.

What soil pH do tepary beans need?

A pH of about 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

This page gives you the thresholds; the planner turns them into your own calendar. It works from what you can observe and measure in your garden rather than from dates written for somebody else’s latitude.

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SoilCommander Editorial Team

Science-based growing guides · Thresholds that hold in any climate

This guide states the conditions the plant itself responds to — soil temperature, frost tolerance, day length — rather than dates, because the same calendar month means opposite seasons in the northern and southern hemispheres. Anything genuinely restricted to one part of the world is named as such rather than presented as universal. Written and maintained by our editorial team against international horticultural research and extension sources.

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How to Grow Tepary Beans | Complete Growing Guide

Tepary Bean (Phaseolus acutifolius)

Quick Facts

Soil & Growing Conditions

Harvest & Storage

Tepary bean, cultivated and wild

References

Frequently Asked Questions

Where To Go From Here

Plan the next step

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How to Grow Tepary Beans | Complete Growing Guide

Tepary Bean (Phaseolus acutifolius)

Quick Facts

Soil & Growing Conditions

Harvest & Storage

Tepary bean, cultivated and wild

References

Frequently Asked Questions

Where To Go From Here

Plan your veg garden before you dig a single inch

Plan the next step