How to Grow Lima Bean
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Lima Bean
Phaseolus lunatus
vegetableLima beans are warm-season legumes prized for their large, flat, creamy seeds that are high in protein and fiber. They grow as either bush or pole varieties and require consistent warmth and moisture to thrive. These nutrient-rich beans are a staple in many cuisines and are relatively easy to grow in suitable climates.
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Example Lima Bean timeline · Pittsburgh, PA (Zone 6b)
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Plant Lima Bean
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Lima Bean
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Lima Bean dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 6-10; thrives in warm climates with temperatures consistently above 65°F
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Germination & Seedling
2-3 weeksSeeds sprout within 7-10 days in warm soil. Cotyledons emerge first, followed by the first true leaves.
Keep soil consistently moist but not waterlogged. Ensure soil temperature is at least 65°F, ideally 70-80°F. Thin seedlings to proper spacing once true leaves appear.
Vegetative Growth
3-4 weeksPlant develops multiple compound leaves and establishes a strong root system. Bush varieties become bushy; pole varieties begin climbing.
Provide support/trellis for pole varieties. Maintain consistent moisture and steady temperatures. Avoid excess nitrogen which promotes foliage over pods.
Flowering
2-3 weeksSmall white, pink, or purple flowers appear in clusters at leaf axils and along the stems.
Maintain consistent watering, especially during flowering. Provide pollinator access. Do not overwater at this stage as it can cause flower drop.
Pod Development & Maturation
3-4 weeksFlowers fade and green pods develop, enlarging over 2-3 weeks. Pods turn pale green or whitish when mature.
Continue regular watering. Monitor for pests. Stop overhead watering to reduce disease risk. Pods are ready when slightly firm but seeds still bend slightly.
Harvest
2-4 weeks of pickingPods reach full size and optimal tenderness; seeds inside are full-sized but still soft.
Harvest regularly to encourage continued production. Pick in morning after dew dries. Pods should snap cleanly when bent.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick beetles; use row covers on young plants; apply neem oil or insecticidal soap; plant early to avoid peak populations
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Spray with water to dislodge; increase humidity; use neem oil or sulfur spray; avoid excessive nitrogen
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Use yellow sticky traps; spray insecticidal soap; encourage beneficial insects; avoid broad-spectrum pesticides
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Spray with strong water stream; apply neem oil or insecticidal soap; encourage ladybugs and parasitic wasps
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Remove infested pods promptly; use row covers early season; handpick if population is light; plant early varieties
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Ensure good air circulation; avoid overhead watering; apply sulfur or potassium bicarbonate spray; remove infected leaves
Uses
Fresh and frozen cooking
CulinaryLima beans are delicious when steamed, boiled, or sautéed fresh from the garden. They can be blanched and frozen for winter use, providing a nutritious side dish or ingredient in soups, stews, and casseroles. [source]
Dried storage and recipes
CulinaryMature, dried lima beans provide long-term pantry staples for succotash, lima bean soup, hummus, and traditional Southern dishes. Dried beans store for months when kept cool and dry. [source]
Nutritional and health benefits
MedicinalLima beans are excellent sources of plant-based protein, fiber, magnesium, folate, and polyphenol antioxidants. Regular consumption supports digestive health, blood sugar regulation, and cardiovascular function. [source]
Garden nitrogen fixation
HouseholdAs a legume, lima beans form symbiotic relationships with nitrogen-fixing bacteria in root nodules, naturally enriching soil for subsequent crops and reducing fertilizer needs. [source]
Pollinator and beneficial insect support
WildlifeLima bean flowers attract bees, butterflies, and other pollinators. The plants also provide habitat and food sources for beneficial insects that control garden pests. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest pods when they are plump, tender, and bright green (usually 2-3 weeks after flowering), before they turn yellow or papery. Pick in the morning when pods are firm and full of moisture. Snap pods cleanly from the vine. Harvest regularly every 2-3 days to encourage continuous production. For fresh eating, harvest at immature stage; for storage, allow pods to fully mature and dry on the plant, then shell and dry the beans completely.
Fun Facts
- 🌱 Lima beans originated in Peru and Guatemala thousands of years ago and were named after Lima, Peru, though they were cultivated throughout Central and South America long before European contact.
- 🌱 There are two main growth habit varieties: bush types (compact, determinate) mature all at once, while pole types (vining, indeterminate) produce continuously throughout the season and can yield 2-3 times more than bush varieties.
- 🌱 Lima beans contain linamarin, a compound that breaks down into cyanide when raw, which is why they must always be cooked thoroughly before eating—traditional cooking methods around the world have always included this step.
Gardening Terms
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