Lima beans are ready to harvest at different times depending on whether you want them fresh or dried, and whether you’re growing bush or pole varieties. Bush limas typically mature 65 to 75 days after sowing, while pole limas take 85 to 110 days. But counting days only gets you in the ballpark. The real answer is in the pods themselves.
Harvesting Fresh Lima Beans
If you want tender, green lima beans for eating fresh (sometimes called “shell stage”), you actually harvest them before they’re fully mature. The pods should be plump and filled out, with visible bumps where the seeds press against the walls, but still bright green. The beans inside will not have reached their maximum size yet, and that’s a good thing. At this stage they’re succulent, green, and tender.
A simple way to test: squeeze a bean gently between your thumb and finger. An immature, ready-to-eat bean yields easily to pressure. If it feels hard, tough, or rubbery, you’ve waited too long for fresh eating. Another trick is the thumbnail test. Drag your thumbnail lengthwise across the bean’s skin. On a properly immature bean, the skin peels away easily. On an overmature bean, it won’t.
One complication: a single vine will have pods at every stage of development, with blossoms still forming at the tips while the earliest pods are already full. You’ll need to harvest selectively, picking the plump green pods and leaving the younger ones to keep growing. Some gardeners let the first pods go a bit past prime on purpose, knowing the later-developing pods will give them a bigger overall yield of tender beans.
Harvesting Dried Lima Beans
For dried lima beans, you wait much longer. Leave the pods on the plant until about 80% of them have changed to their mature color, which is typically tan, brown, or straw-colored depending on the variety. The beans inside will be hard and white or cream-colored. The pods should feel dry and papery, and the beans will rattle inside when you shake them.
If the weather cooperates, you can let pods dry right on the vine. In humid climates or if rain is threatening, pull the entire plant and hang it upside down in a dry, ventilated space to finish drying. Beans for storage should be hard enough that you can’t dent them with a fingernail.
Bush vs. Pole Variety Timing
Bush limas like Henderson and Fordhook 242 are the faster option, reaching harvest stage in 65 to 75 days from direct sowing. They tend to produce most of their crop in a concentrated window, which makes timing simpler but also means you need to pay attention or you’ll miss peak harvest.
Pole limas take 85 to 110 days but produce over a longer period, giving you a more extended harvest window. You can pick fresh beans from pole varieties for weeks as new pods continue to develop. The tradeoff is that they need trellising and a longer frost-free growing season.
Fordhook 242 produces the classic large, thick lima beans, while Henderson types are smaller “baby limas” that mature a bit faster. For both, the harvest cues are the same: plump green pods that yield to pressure for fresh eating, or dry brown pods for storage beans.
How Frost Affects Your Harvest Window
Lima beans are warm-season crops, and fall frost is the main threat to late-season harvests. A light frost (temperatures just below 32°F) will damage the leaves but won’t ruin the pods. You can still harvest normally and may have several weeks to get them picked.
The critical threshold is 28°F. When temperatures drop that low, the pods themselves freeze, and the harvest window collapses to about 48 hours. After a hard freeze, beans that sit too long on the vine begin to sour and become unusable. If a freeze is in the forecast, pick everything you can beforehand, even pods that aren’t quite ideal. Slightly immature beans are better than frozen ones.
Storing Fresh Lima Beans After Harvest
Fresh lima beans are highly perishable. If you’re not cooking them right away, cool them down as quickly as possible after picking. Unshelled beans in their pods keep best at 40 to 43°F. If you’ve already shelled them, they can go a few degrees colder, down to 37 to 40°F. High humidity (around 95%) prevents them from drying out.
In practical terms, this means your refrigerator’s crisper drawer. Unshelled pods will hold for a few days, shelled beans slightly longer since the pods are actually more sensitive to cold damage than the beans themselves. For longer storage, blanch the shelled beans for two to four minutes, then freeze them. Frozen limas keep well for several months.