Oregon · zones 6a–9a
When to plant bell peppers in Oregon.
Sow or transplant between May 1 to Jun 22 in a typical year, keyed to Oregon's median last frost around Apr 15. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Bell Peppers dates for a typical Oregon season.
1 · Start indoors
Mar 20 to May 11
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
May 1 to Jun 22
Keyed to the ~Apr 15 last frost. Sow 0.25" deep, 18" apart.
Harvest
~70 days later
~4 lb per plant over ~8 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
Bell peppers need 70 days from transplant and warm nights to fill out, and this state's marine valleys are stingier with warm nights than its zone map lets on.
Seventy days in the ground, but the clock that matters is nights, not frost dates
The frost date is the wrong thing to watch for a bell pepper here: its 70 days from transplant to full-size fruit, close to what a slicing tomato takes, actually hinge on how many warm nights fall inside them, not on when the frost clears. This state's zones run from a mild 8 in the valley and along the coast to a cold 6a and 6b east of the mountains and up in elevation, and the valley side, despite its milder zone number, often runs cooler at night through early summer than the zone map would suggest, since marine air off the coast pushes inland and settles into the valley after dark. Space transplants 18 inches apart in the row, tighter than a tomato needs, and if starting seed indoors, sow it shallow, about a quarter inch down.
If the plant is covered in flowers that keep dropping before they swell into fruit, resist the urge to treat for something. None of the four problems that show up on peppers here, aphids, bacterial leaf spot, phytophthora blight, and flea beetles, causes blossom drop, so spraying treats the wrong culprit and wastes the trip to the shed. Give the plant another week or two of warmer nights and watch for flowers that hold and start swelling instead of falling; that's the real sign the corner has turned.
Wet spring soil and the disease it invites in
Phytophthora blight is a soil-borne water mold, not a true fungus, and it thrives in the conditions this state's clay-heavy valley soils create in a wet spring: standing water, or soil that stays saturated for days after a heavy rain. The tell is a plant that wilts on one side while the rest still looks healthy, especially after a wet stretch; pull it and check the stem where it meets the soil. If that stem is dark, soft, and water-soaked rather than firm and green, the plant is not coming back, and the fix isn't a spray, it's drainage: raise the bed, work in compost to open up the soil, and don't put peppers back in that spot next year, since the organism persists in the soil once established.
Bacterial leaf spot moves a different way, riding on splashing water rather than sitting in the soil. Small, dark, water-soaked spots ringed with yellow show up on leaves first, usually after a run of wet or humid weather, and splash from overhead watering or hard rain can carry it to a new leaf or a new plant. Water at the soil line instead of overhead where you can, and if you have to work around wet plants, water or tie them up last, since wet foliage brushing against your hands and sleeves is one of the easier ways this spot moves down the row.
Flea beetles on the transplants, and four pounds a plant to show for the season
Flea beetles do almost all their damage in the first couple of weeks after transplanting, when the plant is small and every leaf matters. Look for a scatter of tiny round holes, like something shot the leaf with a miniature shotgun, across the newest growth; a transplant hit hard enough can be set back for good, while an established plant shrugs off the same damage. Aphids show up later and cluster on the undersides of leaves and on new shoot tips; a hard water spray most mornings keeps a light infestation from becoming a heavy one.
A plant that gets through all of that can produce around 4 pounds of fruit over the season, less than a tomato plant gives back, but from a plant that takes up less room, 18 inches to a tomato's 24, and seventy days that ask more of the nights than of the days.
In Oregon: watch for
The pests that find bell peppers here.
A middle-length season, about 193 frost-free days, means pepper, bell overlaps aphids for a stretch each summer. Check plants every week or two and treat early.
Clusters on new growth, sticky leaves, curling tips. Green peach aphid spreads virus.
Organic fix: Blast with water, then insecticidal soap or neem.
Bacterial leaf spot
Small water-soaked spots that turn brown; badly spotted leaves drop.
Organic fix: Plant resistant varieties, avoid overhead watering, rotate out of nightshades.
Plant wilts and collapses at the soil line after a bed stays soggy.
Organic fix: Plant on raised ground for drainage; remove collapsed plants and do not replant there.
Tiny shot-hole pits peppering young leaves.
Organic fix: Row cover the seedlings; healthy transplants outgrow the damage.
Your season math: Oregon gives bell peppers about 193 frost-free days, and it needs roughly 70 days to a first harvest. It's a one-planting crop, so time that single sowing well.
Planting bell peppers in Oregon: questions
When should I plant bell peppers in Oregon?+
In a typical Oregon year, sow bell peppers or set out transplants between May 1 to Jun 22, keyed to the state's median last frost around Apr 15. Your exact dates shift with your ZIP code and microclimate.
When do I start bell peppers seeds indoors in Oregon?+
Start seeds inside about 6 weeks before set-out: roughly Mar 20 to May 11 for a typical Oregon season.
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 bell peppers 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.