Oregon · zones 6a–9a
When to plant green beans in Oregon.
Sow between Apr 15 to Jun 5 in a typical year, keyed to Oregon's median last frost around Apr 15. A second, fall sowing fits Jul 11 to Aug 13. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Green Beans dates for a typical Oregon season.
Direct sow
Apr 15 to Jun 5
Keyed to the ~Apr 15 last frost. Sow 1" deep, 3" apart.
Fall round
Jul 11 to Aug 13
Counted back from the ~Oct 25 first frost.
Harvest
~55 days later
~0.75 lb per plant over ~3 weeks.
Oregon spans more than one climate: Zone 8 is the most common zone, but the state runs 6a to 9a. 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.
Oregon growing notes
This state hands the bush bean two separate seasons instead of one, spring and fall both, and its fifty-five days to maturity is short enough to run several sowings through each.
Fast enough to repeat on both ends of summer
A bush bean sits tighter than almost anything else seeded here: direct-seeded an inch deep, plants need just 3 inches between them in the row, since a bush plant stays compact and never sends out the runners a pole variety or a vining crop would. This state opens two separate windows for the crop, one in spring and another in fall.
Fifty-five days is fast enough that the season here has room for as many as fourteen separate sowings, and that number only makes sense as a run of staggered plantings rather than fourteen full back-to-back cycles, since even 193 days could not fit that many 55-day rounds end to end. In practice this means a fresh short row sown every week or two rather than one large planting that comes ready together and then quits, giving a steady trickle of beans instead of two separate floods.
Which season actually carries the crop here
West of the Cascades, marine air keeps summer from turning brutal, and a garden there can often run sowings from spring into fall with barely a dead stretch in between, treating the two windows almost as one long relay. East of the mountains, the hotter, drier summer can stall pod set during its worst stretch even on a plant that still looks green and otherwise healthy. The test is simple: if blossoms quit setting pods through the hardest heat of summer and start again once nights cool back down, that was heat, not a pest or disease, and no spray in the shed fixes it.
That is why a garden on the hot, dry side of the state gets more out of treating spring and fall as two deliberate, separate plantings bracketing that rough midsummer stretch, rather than counting on one continuous run the way a marine-side garden can. Either way, the crop's short 55 days means a stalled or lost planting is rarely a season-ending problem, just a two-month setback.
A beetle in ladybug's clothing, two leaf diseases, and what a ten-foot row actually adds up to
The Mexican bean beetle is easy to misjudge at first glance: the adult is a dull, coppery orange beetle with 16 small black spots that reads as an oversized ladybug, one of the few garden pests built to look beneficial rather than avoid notice. The larvae give it away: spiny, pale yellow grubs that feed in clusters on the underside of leaves and skeletonize them, leaving a lace of veins where solid leaf tissue used to be. Rust and powdery mildew both show up on the foliage, rust as small orange-red pustules mostly on the leaf undersides, powdery mildew as a dusty white film across the top, and both move in faster on a row left crowded and still than on one where the 3-inch spacing has been respected and air can move between plants.
Anthracnose marks the pods themselves with small, dark, water-soaked spots that sink in and blacken as they age, and picking a wet row spreads it fast, since brushing against damp, infected foliage while harvesting carries the fungus from plant to plant as efficiently as rain does. Aphids gather on new growth and the undersides of young pods; a firm jet from the hose knocks most of a light cluster loose before it builds into a heavy one. None of this erases the numbers: at 3 inches between plants, a ten-foot row holds around forty of them, and at three-quarters of a pound a plant, that is roughly 30 pounds of beans from a single planting, without touching any of the other thirteen rounds the season allows.
In Oregon: watch for
The pests that find green beans here.
A middle-length season, about 193 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: Oregon gives green beans about 193 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 Oregon: questions
When should I plant green beans in Oregon?+
In a typical Oregon 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 11 to Aug 13. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Oregon?+
Oregon spans zones 6a–9a, mostly zone 8. 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.