Harvest Snap Beans Early and Often


Snap beans come in a wide range of colors. Photo: http://www.homepreservingbible.com

Snap beans (Phaseolus vulgaris) are popular garden vegetables, beans that are usually harvested when they are still young and tender and when they “snap” when broken. The entire pod is eaten along with the immature seeds inside. The color of the pod depends on the variety sown in the spring: it can be green, yellow, purple, red or marbled.

French or filet beans are extra thin. Photo: http://www.oscseeds.com

French beans or filet beans are harvested even younger, when the pod is pencil thin: less than ¼ inch (6 mm) in diameter. 

At this point, the pod is still thin and tender and you’ll barely be able to distinguish the immature seeds inside. If you wait too long, however, the seeds become bigger and take on a pasty texture. If you wait even longer, the pod itself becomes fibrous and inedible. Also, if you leave the beans too long on the plant, it will stop producing new beans.

Ideally, therefore, you should harvest your snap beans when they are about the size and shape you see in the grocery store. Check snap beans regularly, every 3 to 5 days (2 days for French/filet beans), picking the pods while they are still immature, because this regular harvesting stimulates the plant to bloom again and therefore to produce more pods.

Runner beans (the climbing form of snap bean) will far outperform bush beans (the dwarf, non-climbing form) on this level: they’ll flower again and again—and will thus keep producing more beans—pretty much as long as you keep harvesting. Bush beans have a much shorter harvest window: you can rarely get more than 2 or 3 harvests per plant.

Dry Beans

Harvest dry beans when the pod yellows. Photo: recettessimples.fr

But the text above assumes you want to eat snap beans, that is, fresh bean pods. If your goal is to produce dry beans, either for cooking or so you can save the seeds for next year’s vegetable garden, you have to use a different tactic.

Dry beans are harvested when the pods are fully mature, later in the season. At this point, the pods will no longer be thin and tender, but lumpy, papery and inedible. And you can no longer snap them. Wait until the pods have turned started to yellow before you harvest. This indicates that the seeds are mature. Don’t wait until the pods turn completely brown, though, otherwise the pods they may open and the seeds can fall to the ground.

When you grow dry beans, don’t expect a prolonged harvest: they’ll all ripen at about the same time.

Adapted from an article originally published on July 25, 2015.

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