Delaware · zones 7b–7b
When to plant bell peppers in Delaware.
Sow or transplant between Apr 28 to Jun 19 in a typical year, keyed to Delaware's median last frost around Apr 12. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Bell Peppers dates for a typical Delaware season.
1 · Start indoors
Mar 17 to May 8
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Apr 28 to Jun 19
Keyed to the ~Apr 12 last frost. Sow 0.25" deep, 18" apart.
Harvest
~70 days later
~4 lb per plant over ~8 weeks.
Delaware spans more than one climate: Zone 7 is the most common zone, but the state runs 7b to 7b. 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.
In Delaware: watch for
The pests that find bell peppers here.
A middle-length season, about 203 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: Delaware gives bell peppers about 203 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 Delaware: questions
When should I plant bell peppers in Delaware?+
In a typical Delaware year, sow bell peppers or set out transplants between Apr 28 to Jun 19, keyed to the state's median last frost around Apr 12. Your exact dates shift with your ZIP code and microclimate.
When do I start bell peppers seeds indoors in Delaware?+
Start seeds inside about 6 weeks before set-out: roughly Mar 17 to May 8 for a typical Delaware season.
What USDA zone is Delaware?+
Delaware spans zones 7b–7b, mostly zone 7. 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.