Lima beans are the heat-loving bean of Zone 10: they need warm soil and a long hot season, and they reward it with pods of creamy, buttery beans. They are slower than snap beans and fussier about cold, but in Zone 10's long summer they have all the time they need.
Zone 10 at a glance
USDA Zone 10 covers the warmest parts of the United States, including southern Florida, the southern tip of Texas, coastal southern California and Hawaii. Winters are mild, with average winter lows of 30 to 40°F, and the growing season runs nearly all year — frost is rare rather than a regular event.
The average last spring frost in Zone 10 is Jan 15–30 (frost rare), and the average first autumn frost is Dec 15–31 (frost rare). These are zone averages drawn from NOAA frost records, not exact dates for any one garden — always check your local extension service and the forecast before planting tender crops outside. Frost dates vary by microclimate, elevation and year, so treat them as a guide, not a promise. Use our frost date calculator for your zone's averages.
When to plant lima beans in Zone 10
Plant lima beans from March to August in Zone 10, sowing seed directly once the soil is warm. Lima beans are tender heat lovers: they need warm soil to germinate and are killed by frost, so wait until well after the average last frost of Jan 15–30 and until the soil has warmed. Beans mature 60–90 days after sowing. Because Zone 10 has a long, nearly year-round growing season, the question is rarely whether lima beans will grow, but whether you plant them in the right season — heat lovers go in after the last frost, cool-season crops go in for autumn and winter.
Lima Beans planting at a glance
| Detail | Zone 10 guidance |
|---|---|
| Best planting window | March to August |
| Start indoors | Not needed — direct sow |
| Days to germination | 7–14 |
| Days to maturity | 60–90 |
| Spacing | 4–6 in |
| Soil pH | 6.0–7.0 |
| Sun | full sun |
| Water needs | moderate |
| Cold tolerance | tender |
All figures are broad published ranges from standard horticultural references, and they vary by variety, soil and weather. Check your local extension service for advice on your own garden.
Starting lima beans
Sow lima beans directly — they dislike transplanting and their large seeds rot easily in cold, wet soil. Sow seed an inch deep in warm, damp soil, and do not water again until seedlings emerge, as overwatering causes seed rot. Seed germinates in 7–14 days in warm soil. Bush types need no support; pole types need a trellis, fence or poles to climb. In Zone 10, a succession sowing in early summer keeps the harvest going into autumn.
Soil, spacing and sun
Lima beans need full sun and well-drained, moderately fertile soil with a pH of 6.0–7.0. Work in compost before planting, but avoid heavy nitrogen feeding: beans fix their own nitrogen, and excess nitrogen makes leafy plants with few pods. Space plants 4–6 inches apart in rows, with rows wide enough for the type — pole beans need room to climb. In Zone 10's sandy soils, compost holds the moisture beans need without waterlogging the seed.
Watering and feeding
Lima beans have moderate water needs and grow best with even moisture, especially while pods are filling: drought at that stage gives small, tough beans. Water deeply and regularly, and mulch to hold moisture in Zone 10's heat. Water at the base to keep leaves dry and reduce disease, and avoid handling wet plants, which spreads fungal problems. Reduce watering once pods are mature and drying for shell beans.
Companion planting
Good companions for lima beans are marigolds, basil, onions and lettuce. Beans are generous neighbours: they fix nitrogen that following crops use, so they are often planted before heavy feeders such as corn or squash. Corn is the classic partner for pole beans, giving them something to climb. Avoid planting beans near onions, garlic and other alliums, which grow poorly alongside legumes, and do not follow beans with beans in the same bed.
Pests and problems
The pests to watch for are aphids, bean beetles, slugs and cutworms. Mexican bean beetles chew leaves from below and are the most specific enemy; pick them off by hand and check leaf undersides for their yellow eggs. Aphids cluster on young shoots and can be washed off. Slugs nibble seedlings on damp nights. Bean rust and other fungal diseases spread in wet weather, so space plants for air flow, water at the base, and remove affected leaves promptly.
Harvesting and storing lima beans
Harvest lima beans when the pods are plump and the beans inside are full-sized, 60–90 days after sowing. For fresh shell beans, pick pods when they feel full but are still green and tender, and shell the beans straight away. For dry beans, leave pods on the plant until they are dry and rattling, then shell and store in jars. Pick regularly to keep plants producing, and use fresh beans within a few days or blanch and freeze them.
Frequently asked questions
When do I plant lima beans in Zone 10?
From March to August, sown directly once the soil is warm. They are heat lovers — check your local extension service for the best dates in your area.
Why did my lima bean seed rot instead of sprouting?
Cold, wet soil is the usual cause. Wait until the soil is warm, sow in damp but not soaked soil, and do not water again until seedlings emerge.
Should I grow bush or pole lima beans?
Bush types crop earlier and need no support; pole types crop for longer and give more beans per square foot, but need a trellis or poles.
How long do lima beans take to grow in Zone 10?
Seed germinates in 7–14 days and beans mature in 60–90 days.
For the full year, browse the planting calendar hub. Nearby: april in Zone 10, Lima Beans in Zone 9 and Snap Peas in Zone 10. Use the germination time calculator and the harvest date calculator to plan your own dates.