Missouri · zones 5b–7a
When to plant green beans in Missouri.
Sow between Apr 15 to Jun 5 in a typical year, keyed to Missouri's median last frost around Apr 15. A second, fall sowing fits Jul 6 to Aug 8. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Green Beans dates for a typical Missouri season.
Direct sow
Apr 15 to Jun 5
Keyed to the ~Apr 15 last frost. Sow 1" deep, 3" apart.
Fall round
Jul 6 to Aug 8
Counted back from the ~Oct 20 first frost.
Harvest
~55 days later
~0.75 lb per plant over ~3 weeks.
Missouri spans more than one climate: Zone 6 is the most common zone, but the state runs 5b to 7a. That's why the planner works from your ZIP code's frost dates, not your zone: mountain and coastal gardens in the same state can be three weeks apart.
Missouri growing notes
Missouri's long season lets you sow bush beans several times over.
Succession sowing is the whole strategy
A bush bean matures in about 55 days, and Missouri's frost-free stretch, averaging six months from mid-April to late October, comfortably fits 3 to 4 separate sowings with room to spare between the average last spring frost and first fall frost. Sow a new 10-foot row every 2 to 3 weeks from mid-spring through midsummer rather than planting the whole season's beans at once; that spreads the harvest into a steady daily handful instead of one overwhelming week followed by nothing.
Space seed 3 inches apart in the row, an inch deep, and thin only if germination runs unusually thick; bush beans are one of the few crops in a Missouri garden that rarely need thinning if the seed goes in at the right spacing to start. A well-managed row yields close to three-quarters of a pound per plant across its productive life, which for a 10-foot row works out to several meals a week at peak.
Rust and mildew are a summer certainty, not a maybe
Missouri's humid summer air makes rust and powdery mildew close to inevitable on bush beans by midseason, not an occasional risk the way it might be in a drier state. Rust shows up first as rust-colored spots on the underside of leaves, and powdery mildew follows as a white, flour-like coating, both spreading fastest on foliage that stays wet overnight. Watering at the soil line in the morning instead of overhead in the evening is the single change that slows both the most.
Provider carries documented rust resistance, a trait traced back to USDA's 1966 Charleston breeding work, and is worth seeking out specifically for Missouri's humid summers rather than whatever bush bean is cheapest at the store. Derby, an All-America Selections winner from 1990, does not share that rust protection; its real strength is resistance to bean common mosaic virus, the aphid-spread disease that stunts plants and mottles the leaves, so growing the two side by side covers two separate risks rather than doubling up on one. Even a resistant variety benefits from wider-than-minimum spacing in a humid year; airflow between plants matters as much as the variety tag once summer humidity sets in.
Mexican bean beetle hides in plain sight
Mexican bean beetle looks enough like a large, coppery ladybug that many Missouri gardeners misidentify it and let the population build for weeks. The giveaway is the underside of the leaf: clusters of 40 or more bright yellow-orange eggs, and later, fuzzy yellow larvae that skeletonize leaf tissue between the veins, leaving a lace pattern a healthy bean plant cannot photosynthesize through for long.
Check the underside of a handful of leaves each time you pick, since the beetle overwinters in garden debris and Missouri's mild winters let more of them survive to spring than a harsher climate would; scraping egg clusters into a cup of soapy water takes seconds and, done weekly starting once plants flower, keeps a home planting ahead of the population all season.
In Missouri: watch for
The pests that find green beans here.
A middle-length season, about 188 frost-free days, means bush bean overlaps mexican bean beetle for a stretch each summer. Check plants every week or two and treat early.
Coppery ladybug-like beetles; leaves skeletonized to lace.
Organic fix: Handpick adults and yellow egg clusters; neem.
Orange or white spots on leaves late in the season.
Organic fix: Water at the base, space plants, spray neem.
Anthracnose
Sunken dark-red cankers on the pods, and leaf veins turning brick-red to black underneath.
Organic fix: Start with certified seed, water at the base, and stay out of the patch while the leaves are wet.
Your season math: Missouri gives green beans about 188 frost-free days, and it needs roughly 55 days to a first harvest. That fits about 14 re-sown rounds across the season, so you can keep it coming instead of picking once.
Planting green beans in Missouri: questions
When should I plant green beans in Missouri?+
In a typical Missouri year, sow green beans between Apr 15 to Jun 5, keyed to the state's median last frost around Apr 15. There's also a fall window: Jul 6 to Aug 8. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Missouri?+
Missouri spans zones 5b–7a, mostly zone 6. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many green beans plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.