Lima beans are the southern classic that Zone 7 summers suit perfectly — buttery, productive and far better fresh than dried. This guide covers when to plant lima beans zone 7 in detail: the sowing, transplanting and harvest windows for USDA Zone 7, plus spacing, soil, water, companions, pests and storage — all based on USDA zone averages and standard published crop ranges.
Zone 7 covers areas with average annual minimum temperatures of 0 to 10°F. The average last spring frost falls in the Mar 15–Apr 1 range and the average first autumn frost in the Nov 1–15 range. These are USDA zone averages, not exact dates for any one garden — check your local extension service and the forecast before planting tender crops outside. The frost-free season runs roughly seven months, from late March into early November,
When to plant lima beans in Zone 7
Sow lima beans directly in mid-May to early June, once the soil is warm — beans rot in cold, wet soil, so patience pays. Sow seed about an inch deep, spacing bush types 4–6 inches apart and pole types around supports. Germination takes 7–14 days in warm soil.
The table below puts the whole season on one page. All dates are ranges worked back from the Zone 7 frost averages (Mar 15–Apr 1 last frost, Nov 1–15 first frost) and the crop's published days to maturity (60–90 days). Use the frost date calculator to check the averages for your own area, and confirm them with your local extension service.
| Stage | Zone 7 window | Notes |
|---|---|---|
| Start indoors | — (direct sow; beans dislike transplanting) | Germination takes 7–14 days |
| Direct sow outdoors | Mid-May–early June, when the soil is warm | Sow into moist, prepared soil |
| Transplant outdoors | — | Harden seedlings off first |
| First harvest | July–Sep, 60–90 days after sowing | 60–90 days to maturity |
| Autumn / second sowing | Sow by early July for a late crop | Count back from the first frost |
Starting and planting
Lima beans need full sun and soil with a pH of 6.0–7.0. As legumes they fix their own nitrogen, so go easy on fertiliser — too much nitrogen gives leafy plants and few pods. Water steadily while pods are forming, and mulch to keep the soil evenly moist.
Before sowing, fork the bed over, remove weeds and stones, and dig in well-rotted compost. Lima Beans grows best at a soil pH of 6.0–7.0 — test your soil through your local extension service before amending it.
Spacing, sun and soil
Space plants 4–6 inches apart. Crowded plants compete for light, water and nutrients, stay small, and invite disease through poor airflow, so thin seedlings to the final spacing once they are established.
This crop needs full sun — at least six hours of direct sun a day, and more is better. In Zone 7, a south-facing bed or an open spot away from trees and fences gives the strongest growth and the best flavour.
Soil should be deep, fertile and free-draining, with a pH of 6.0–7.0. Heavy clay improves with compost and organic matter, and raised beds help where drainage is poor.
Watering
Water needs are moderate: aim for steady, even moisture rather than feast-and-famine watering. About an inch of water a week from rain or irrigation is a useful guide in most Zone 7 summers, more in hot, dry spells. Water at the base of the plant in the morning, mulch to hold moisture, and avoid wetting the leaves, which invites disease.
Companion planting
Good companions for lima beans include marigolds, basil, onions, lettuce. Planting companions nearby can help with pest confusion, pollination and making the most of bed space — marigolds, for example, are a classic companion across the vegetable garden. The companion planting finder can suggest combinations for your whole bed. Avoid planting lima beans where others of the same family (Fabaceae) grew last year: rotate crops each season to reduce soil-borne disease and pest build-up.
Common pests and problems
Watch for aphids, bean beetles, slugs, cutworms. - Aphids — inspect weekly; hand-pick or wash off with water, and encourage natural predators.
- Bean Beetles — inspect weekly; hand-pick or wash off with water, and encourage natural predators.
- Slugs — inspect weekly; hand-pick or wash off with water, and encourage natural predators.
- Cutworms — inspect weekly; hand-pick or wash off with water, and encourage natural predators.
Beyond pests, the main problems are weather-related: a late frost after transplanting, drought at a critical stage, or waterlogged soil after heavy rain. Cover tender plants with frost cloth if a late frost threatens, and mulch to even out soil moisture.
Harvest and storage
Pick lima beans when the pods are plump and the beans inside are full-sized but still tender, about 60–90 days after sowing. For fresh shelling beans, pick as the pods begin to yellow slightly; for dried beans, leave the pods on the plant until they are fully dry and rattling.
Fresh shelled limas keep for a few days in the fridge and freeze beautifully after blanching. Dried beans, fully dry and stored in airtight jars, keep for a year or more.
The classic Zone 7 mistake with lima beans is sowing into cold soil. Seed rots before it germinates — wait until mid-May, when the soil is warm, and sow again if a cold, wet spell follows.
Frequently asked questions
When should I plant lima beans in Zone 7?
Sow lima beans directly in mid-May to early June, once the soil is warm — beans rot in cold, wet soil, so patience pays. Work from the table above, using the average last frost (Mar 15–Apr 1) and first frost (Nov 1–15), with 60–90 days to maturity. These are USDA zone averages, not exact dates for any one garden — check your local extension service and the forecast before planting tender crops outside.
How much sun does lima beans need in Zone 7?
Full Sun — at least six hours of direct sun a day where possible. Give it the sunniest spot you have.
What soil pH does lima beans prefer?
A pH of 6.0–7.0. Test your soil before amending it, and add compost to improve structure whatever the pH. Your local extension service can test a sample and recommend amendments.
What pests attack lima beans in Zone 7?
The most common are aphids, bean beetles, slugs, cutworms. Inspect plants weekly, hand-pick larger pests, wash small ones off with water, and keep the bed clean and well-spaced so air circulates.
How do I store lima beans after harvest?
Fresh shelled limas keep for a few days in the fridge and freeze beautifully after blanching. Dried beans, fully dry and stored in airtight jars, keep for a year or more.
See the Zone 7 May planting guide for what else to sow and plant in the same month, browse the full planting calendar, and try the Seed Spacing Calculator to plan your dates. For a related crop, see when to plant edamame in Zone 7.