Utah · zones 6a–8b
When to plant green beans in Utah.
Sow between May 1 to Jun 21 in a typical year, keyed to Utah's median last frost around May 1. A second, fall sowing fits Jun 21 to Jul 24. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Green Beans dates for a typical Utah season.
Direct sow
May 1 to Jun 21
Keyed to the ~May 1 last frost. Sow 1" deep, 3" apart.
Fall round
Jun 21 to Jul 24
Counted back from the ~Oct 5 first frost.
Harvest
~55 days later
~0.75 lb per plant over ~3 weeks.
Utah spans more than one climate: Zone 6 is the most common zone, but the state runs 6a to 8b. 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.
Utah growing notes
Beans need Utah's irrigation turn scheduled around bloom, not around convenience.
Soil warmth first, since Utah's spring is short
Bush beans planted before Utah soil actually warms simply rot rather than sprout, and the real threshold is 60 degrees at 2 inches deep, checked in the morning rather than the afternoon since afternoon sun skews a reading warmer than the ground really is overnight. Utah's last frost typically holds until close to the start of May, and soil at that depth often needs another week or two past that point to hold steady in the 60s, so the frost date itself is not the signal to plant by.
Direct-sown beans anchor a taproot from day one and handle the wind that comes down off the Wasatch canyons better than a transplant would, one reason beans are essentially always direct-seeded here rather than started indoors. Sowing 1 inch deep into soil that has already been checked with a thermometer, rather than guessed at, is the difference between a row that comes up evenly and one that comes up patchy over an extra week or two.
A skipped irrigation turn at bloom costs the whole planting
Beans are most sensitive to a missed watering during the short window when flowers are open and setting pods, and a lot of Utah gardens run on a scheduled irrigation turn rather than water on demand, which can put that vulnerable stage right in the middle of a multi-day dry stretch if the timing is not planned for. A flower that dries out before it sets simply drops rather than recovering once water arrives again.
Moving a bean planting to the front of the irrigation rotation during its bloom stretch, rather than treating every crop in the garden equally, protects the pod set that the rest of the harvest depends on. Because beans reach harvest in about 55 days, a gardener on a fixed turn schedule only has to plan around that one short bloom window per planting, not the whole season.
Eleven rounds and a beetle that hides on the underside
Utah's season supports roughly 11 rounds of beans sown a couple of weeks apart, spring through late summer, which spreads pod production out rather than dumping the whole crop into one short window, useful in a state where a single hailstorm or heat spike can otherwise wipe out an entire planting at once. Staggering rounds also means Mexican bean beetle pressure, which builds through the season, never finds every planting at the same vulnerable young stage.
That beetle lays yellow egg clusters on the underside of leaves, and the spiny orange larvae that hatch skeletonize leaf tissue from below before the damage shows from above; checking the underside of a handful of leaves once a week, turning them over deliberately rather than glancing past them, catches both stages early enough to crush by hand. Rust and powdery mildew show up later in the season on crowded plantings; giving every plant its full spacing and watering in the morning, rather than an evening soak that leaves leaves wet overnight, keeps both fungi from getting a foothold.
In Utah: watch for
The pests that find green beans here.
A middle-length season, about 157 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: Utah gives green beans about 157 frost-free days, and it needs roughly 55 days to a first harvest. That fits about 11 re-sown rounds across the season, so you can keep it coming instead of picking once.
Planting green beans in Utah: questions
When should I plant green beans in Utah?+
In a typical Utah year, sow green beans between May 1 to Jun 21, keyed to the state's median last frost around May 1. There's also a fall window: Jun 21 to Jul 24. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Utah?+
Utah spans zones 6a–8b, 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.