Zone 13 is the hottest USDA zone and the only one that is frost-free year-round, with average winter lows above 60°F. There is no last spring frost and no first autumn frost to plan around, so in Zone 13 you plant by heat and by the wet and dry seasons, not by frost. The limits on what grows are heat, humidity, rain and pests rather than cold. All numbers below are published ranges, not promises for your garden: check your local extension service before you plant.
Lima beans are a true heat lover, and Zone 13 suits them better than almost any other bean: they want warm soil, warm nights and a long season, and they sulk in the cool, wet conditions that other beans tolerate. They take a little longer than snap beans and need a little more patience, but the reward is a generous harvest of creamy, buttery beans that freeze beautifully. Give them heat, sun and something to climb, and they produce for weeks.
Zone 13 timing for lima beans
The table below is the whole plan in one place.
| Step | Zone 13 timing |
|---|---|
| Average winter low | Above 60°F |
| Last spring frost | None — frost-free year-round |
| First autumn frost | None — frost-free year-round |
| Best planting window | Year-round, whenever the soil is warm |
| Start indoors | Not needed — sow direct where plants will grow |
| Direct sow outdoors | Sow direct any time the soil is warm |
| Days to germination | 7–14 days |
| Days to maturity | 60–90 days |
| Cold tolerance | tender |
When to sow lima beans in Zone 13
Sow lima beans once the soil is thoroughly warm, which in Zone 13 is most of the year. They are one of the last beans to sow in spring in cooler zones, but here the only real caution is the wettest weeks, when seed can rot in cold, soggy soil. Sow in succession every few weeks for a long harvest, and let the last sowing mature before the heaviest rains if your area has a distinct wet season.
Starting lima beans: indoors or direct sowing
Lima beans are direct-sown: they resent transplanting and germinate in about a week to ten days in warm soil. Sow seed about an inch deep, and do not soak seed before planting — soaked lima seed rots easily. If the soil is cool or wet, wait a week rather than risking a failed sowing; warm soil gives fast, even germination. Use the seed spacing calculator to plan your rows before you sow.
Soil, spacing and sun
Lima Beans needs full sun. Space plants 4–6 inches apart — crowded plants compete for light, water and air, and disease spreads faster between touching leaves in humid tropical air. Lima beans want well-drained soil and full sun, with a pH in the range in the table below. Like other legumes they fix their own nitrogen, so do not overfeed them — too much nitrogen grows leaves instead of pods. A light dressing of compost at planting is enough, and a mulch keeps the soil warm and moist.
Watering lima beans in Zone 13
Water needs are moderate. Water evenly while plants are flowering and pods are filling — drought at flowering causes blossoms to drop and pods to stay small. Water at the base in the morning, mulch to hold moisture, and ease off once pods are nearly mature.
Companion plants
Good companions for lima beans include marigolds, basil, onions, lettuce. These are the companions listed for this crop in standard horticultural references: they share similar needs, and some, like marigolds, are traditionally planted to help confuse or deter pests. Plant companions in the same bed or nearby, not in a separate corner of the garden, so they actually share the space. Avoid planting heavy feeders that will compete for the same nutrients in the same spot. Use the companion planting finder to check a pairing before you plant it.
Common pests and problems
The pests to watch for are aphids, bean beetles, slugs and cutworms. Aphids cluster on new growth and can be washed off; bean beetles chew leaves and are best hand-picked in the morning. Slugs attack young seedlings on damp nights, so keep the bed tidy. Rotation helps: do not plant beans where beans or peas grew last season.
Harvest and storage
Pick lima beans when the pods are plump and the beans inside are clearly swollen, about two to three months after sowing. Shell them fresh for the best flavour, or leave pods on the vine until dry for storing as dried beans. Pick regularly — plants keep flowering and setting pods as long as you keep harvesting.
Succession and rotation in Zone 13
Succession sowing works year-round in Zone 13 for a heat lover like this: sow a fresh batch every few weeks so young, vigorous plants keep coming as older ones tire, and you avoid a single huge glut. Rotate crops so lima beans does not follow another Fabaceae family crop in the same bed next season. In a frost-free climate some plants can live more than one season, so prune lightly after a fruiting flush and feed with compost rather than pulling a healthy plant. Keep notes on what you sowed and when: with no frost dates to anchor the calendar, your own records are the most useful planting guide you will have.
Related Zone 13 guides
More Zone 13 guides: Edamame in Zone 13 and the same crop in a cooler zone, Lima Beans in Zone 11. The July in Zone 13 guide shows what else to plant in that month, and the planting calendar hub brings all the Zone 13 guides together.
Frequently asked questions
When should I plant lima beans in Zone 13?
Plant lima beans any time the soil is warm. Zone 13 is frost-free with winter lows above 60°F, so there is no last or first frost date to wait for — heat lovers grow year-round here. Check your local extension service for advice on the wet and dry seasons in your area.
Do lima beans need a trellis?
Pole types do, and they produce far more per square foot than bush types. Give pole limas a sturdy trellis, fence or tall poles at planting time, and train the vines up as they grow. Bush types are fine without support but give a shorter harvest.
Why did my lima bean seed rot instead of sprouting?
Lima seed is unusually prone to rotting in cool, wet soil, and soaking it beforehand makes it worse. Sow only into warm, well-drained soil, plant at the depth on the packet, and wait for a dry spell if the ground is soggy.
What soil and spacing do lima beans need?
It needs full sun, soil pH 6.0–7.0, and spacing of 4–6 inches between plants. Work compost into the bed before planting and test the soil rather than guessing the pH.