Field Guide · Seed saving · 5 min read

How to Save Bean Seeds

Leave the pods on the plant until they rattle, then shell them. Beans rarely cross-pollinate and rarely fail.

Written on the farm by Nathan Story · Story Thyme Farms, Missouri · Updated

Story Thyme Farms · Bench card6 wks past eating stage

How to save bean seeds

Phaseolus vulgaris. Saving seed from dry pods

DifficultyNearly automatic
Pods readyBrown, dry, rattling
Self-pollinatingStays true
Viable3–4 years
1Setting plants asideGive up whole plants rather than saving leftover pods
2Letting them dryThe pods turn brown and rattle in about six weeks
3Shelling and sortingShell them and throw out the damaged ones
4Freezing and storingA week in the freezer, then into a jar
Materials needed · Seed envelopes · Pint jars · Marking ribbon
Written on the farm · Missouristorythymefarms.com/guides/how-to-save-bean-seeds

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The long version

Watercolor plate of dry bean pods split open with speckled seeds
Phaseolus vulgaris · field plate

Beans are the seed crop for people who think they cannot save seed. The flower pollinates itself before it even opens, the pod dries the seed for you, and the seeds are big enough to check one at a time. Mark a few plants in June and stop picking from them, and that is most of the work done.

  1. Step 1 · Setting plants aside

    Give up whole plants rather than saving leftover pods

    Watercolour plate of a bean plant marked with a tied ribbon and left unpicked, pods swelling fat while neighbouring plants are picked green

    Tie a ribbon on two or three of your best plants at the height of the season, and never pick a green bean from them again. Pods left at the end of the season on plants you have been picking make weaker seed than pods a plant filled while it was at full strength.

  2. Step 2 · Letting them dry

    The pods turn brown and rattle in about six weeks

    Watercolour plate of tan papery bean pods on a dried-down plant, one split open to show hard rattling seeds

    Roughly six weeks after the pods would have been ready to eat, they turn tan and papery and the seeds rattle inside. That means the seed is finished. If frost or a wet spell is coming first, pull the whole plants and hang them upside down somewhere airy to finish drying.

  3. Step 3 · Shelling and sorting

    Shell them and throw out the damaged ones

    Watercolour plate of dry bean pods being shelled into a bowl, sound plump seeds kept and shrivelled or pinholed ones set aside

    Shell the pods on a rainy afternoon and keep only sound, full-sized seeds. Anything wrinkled, chipped or with a small hole in it should be composted. A small hole means a bean weevil is already inside.

  4. Step 4 · Freezing and storing

    A week in the freezer, then into a jar

    Watercolour plate of a sealed glass jar of dry bean seeds in a freezer, frost on the outside of the glass

    Once the seeds are hard enough that a fingernail leaves no dent, seal them in a jar and freeze them for five to seven days to kill any weevil eggs. Then store them somewhere cool, dark and dry. Beans keep three to four years, and a jar of speckled home-saved beans looks as good as anything on the shelf.

Materials needed
Seed envelopesPint jarsMarking ribbon

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Questions we actually get

Will my pole beans cross with the bush beans next to them?
Common beans self-pollinate almost entirely, ten or twenty feet apart keeps varieties effectively pure for home use. Runner beans are the exception, bees work those hard, so give them real distance from each other.
Can I eat my seed beans?
Same bean, same pot. Dry-saved seed doubles as dry beans for the kitchen. Just save planting stock out first, the soup pot is not picky about germination rates.
Do peas work the same way?
Identically: self-pollinating, dried on the vine to a rattle, frozen for weevils, three-ish years of good germination. One skill, two crops.
From the plant library

Bean — the full profile

Zones, cold-hardy cultivars, spacing, feeding, and where to buy one already rooted.

Open the bean guide →