Autumn Zebra Bean is a Japanese heirloom pole bean celebrated for its striking appearance and savory, umami-rich flavor. Known locally as the 'seaweed bean' for its kombu-like taste, this variety produces silky, thin-skinned dry beans that excel in soups and stews while also offering tender green pods if harvested young. Reaching maturity in 70 to 80 days for fresh eating (or up to 90 days for full dry beans), it thrives in full sun and requires only moderate water, making it a rewarding addition to any garden with vertical space.
Full Sun
Moderate
?-?
?in H x ?in W
—
Moderate
Hover over chart points for details
The seaweed bean nickname captures something essential about this variety: when cooked, Autumn Zebra Bean develops a savory, umami depth that tastes distinctly like kombu, the Japanese sea vegetable. The vibrant, colorful striped pods are visually striking on the vine, and the beans themselves have a superior silky texture that sets them apart from more common dry beans. Gardeners can harvest these dual-purpose beans at the tender green stage for fresh eating, or wait for full maturity and enjoy them as an exceptional dry bean with genuine complexity in soups and traditional Japanese dishes.
These beans shine in soups and stews, where their silky texture and savory kombu-like flavor develop fully during cooking. The thin-skinned dry beans break down beautifully without becoming mushy, making them ideal for miso-based soups and other Japanese-inspired preparations. Gardeners can also harvest the colorful pods at a tender stage to enjoy as fresh green beans, adding versatility to the harvest.
No timeline data available yet for this variety.
Direct sow seeds outdoors after the last frost date when soil has warmed to at least 60 degrees Fahrenheit. Plant seeds 1/2 inch to 1 inch deep, spacing them 6 inches apart along your trellis or pole structure. Seeds will sprout in 5 to 8 days under ideal conditions.
For fresh green beans, harvest pods when they are tender and full but before beans inside have begun to harden, typically around 70 days from planting. For dry beans, allow pods to mature fully on the vine until they are completely dry and brown, which takes 90 days or longer. The pods should snap easily and the beans inside should rattle when shaken. Shell beans by hand once fully dried, or allow pods to dry completely indoors in a cool, dry location before removing beans.
Enter your ZIP code to see a personalized growing calendar for this plant.
“This famous Japanese heirloom arrived in gardens around the world carrying centuries of cultivation history from Japan, where it earned its beloved 'seaweed bean' nickname. The variety represents a living connection to Japanese agricultural tradition and the families who have saved and replanted its seeds across generations, preserving not just genetics but cultural knowledge about flavor and preparation methods that define regional cooking.”