When to Plant Beans in Missouri
Published: April 24, 2026
Missouri gardeners in Zone 6b have a 33-week growing season for bean (March 22 to November 10). The moderate climate supports a full warm-season crop plus an often-productive fall crop. This guide gives exact dates for Missouri based on your local frost calendar.
Bean Planting Dates for Missouri
| Start seeds indoors | Year-round |
| Last frost (average) | March 22 |
| Direct sow outdoors | March 29–April 8 |
| Expect first harvest | May 18 – June 2 |
| Fall crop start | September 1–11 |
| Fall harvest | October 21 |
| First fall frost (average) | November 10 |
Dates above assume Zone 6b, the most common zone in Missouri. Gardeners in cooler St. Louis (Zone 6b) plant 1–2 weeks later; warmer Kansas City (Zone 6a) can plant 1–2 weeks earlier.
⚠ Direct sow beans after last frost when soil reaches 60°F. Never start indoors — beans resent transplanting. Succession plant every 2–3 weeks for continuous harvest.
Growing Beans in Missouri's Climate
Missouri's moderate Zone 6b climate is well-suited to bean with minimal special accommodation. The standard transplant calendar works as written, and harvest windows line up with what seed packets recommend without adjustment.
Succession planting extends your bean harvest significantly in Missouri. A second planting 3 to 4 weeks after the first gives you a backup in case of pest pressure and extends the total harvest window into early fall.
Common bean pests to watch for in Missouri include Mexican Bean Beetle and Aphid. The first line of defense is companion planting: Corn and Cucumber planted nearby discourage several of these pests by confusing host-plant identification or repelling adults before they can lay eggs. Weekly garden walks in the early morning catch problems when they're still manageable.
Bean Garden Calendar for Missouri
| Month | Task | Notes |
|---|---|---|
| January | — | Dormant season |
| February | — | Dormant season |
| March | Direct sow seeds | Sow seeds 1/4–1/2 inch deep, 4 inches apart |
| April | — | Dormant season |
| May ← | First harvest window opens | Bean begins producing 50–65 days after transplant |
| June | Peak growth; water 1 inch/week | Monitor for pests daily; stake or support as needed |
| July | Start fall crop seeds | Fall transplants go in 10 weeks before first frost |
| August | — | Dormant season |
| September | Fall crop planting | Transplant or direct sow for fall harvest before frost |
| October | — | Dormant season |
| November | First frost approaches | Harvest remaining bean; cover plants on frost nights |
| December | — | Dormant season |
Bean Growing Tips for Missouri Gardeners
- •Inoculate bean seeds with rhizobium bacteria before planting in new garden soil — boosts nitrogen fixation and yields.
- •Plant bush beans every 2–3 weeks through midsummer for a continuous harvest from July to first frost.
- •Missouri's moderate climate supports succession planting — sow new transplants or seeds every 3 weeks during spring to extend the harvest window into fall.
- •Pole beans produce for 6–8 weeks from a single planting; plant once, harvest all season.
Companion Planting for Beans in Missouri
In Missouri's moderate climate, planting bean with Corn and Cucumber helps deter pests and improve soil. Avoid planting near Onion and Garlic, which inhibit bean growth through root chemistry or shared pest pressure. See the full bean companion planting guide for the complete list.
Beans Planting Dates by City in Missouri
Top cities in Missouri — select for city-level frost dates and planting calendars.
Frequently Asked Questions
When should I plant bean in Missouri?
In Missouri (Zone 6b), start bean seeds indoors around Year-round and transplant outdoors around null — 0 weeks after the state's average last frost of March 22.
What is the last frost date in Missouri?
Missouri's average last frost date is March 22 in the state's most common Zone 6b. Frost dates vary by city — higher elevations and northern counties run 1 to 3 weeks later than the state average. See the city list below for city-level frost dates.
Can I grow bean year-round in Missouri?
Not year-round — Missouri's cold season stops bean production. The bean season runs March 22 to November 10, roughly 33 weeks. A fall crop extends harvest into late autumn.
What bean varieties grow best in Missouri?
For Missouri's Zone 6b, consult a local nursery or extension office for beans variety recommendations.
When do I start bean seeds indoors in Missouri?
Bean does not need indoor starting in Missouri — direct sow around March 29–April 8 once soil reaches 60°F. Indoor starting is not recommended for this crop because bean transplants poorly.