How to grow chili pepper
Capsicum annuum / chinense · Solanaceae · Vegetable
When to plant chili peppers: the short answer
Start seeds indoors about 8 weeks before your last spring frost; plant out about 2 weeks after it. Wait until the soil is at least 65°F; chili peppers sprout fastest near 85°F.
Zone 5: plant out May 7 – May 24. Zone 7: plant out Apr 12 – Apr 29. Zone 9: plant out Feb 27 – Mar 16. See every zone.
Chili Pepper is a warm-season vegetable in the Solanaceae family, usually started indoors and set out as transplants. It wants full sun (six or more hours of direct light) and steady, even moisture. From sowing to first pick is about 70–100 days. It is killed by frost, so nothing goes outside until the danger has passed and the soil has warmed.
Grower’s note: Superhots (C. chinense) can need 100+ days and the longest indoor start. Withholding some water late raises heat.
Sowing
Sow about 0.25″ deep, into soil between 65–95°F — germination is quickest near 85°F. It is slow and often erratic to germinate (7–21 days). For an early crop, start seed indoors about 8 weeks before your last spring frost and grow it under bright light.
Spacing & layout
Give each plant about 18″ along the row with roughly 24″ between rows. On a square-foot grid that is 1 per square foot. Allow at least 12″ of loose, workable soil for the roots. It grows well in containers at least 10″ deep.
Fitting it to your season
Chili Pepper needs roughly 70–100 frost-free days to crop. Where the season is shorter than that, start it indoors and choose the earliest-maturing varieties, or grow it in a container you can move under cover on cold nights. In long, hot-summer regions it can often be planted twice — once in spring and again in mid-to-late summer for a fall harvest.
Quick facts
Growth stages: how long chili peppers take to grow
From seed to first harvest takes roughly 20-24 weeks: about 10 weeks as a seedling indoors, then 70-100 days in the garden.
When to plant chili pepper
When to plant chili peppers by USDA zone
Dates worked out from each zone’s typical frost dates for 2026. Find your zone on the zone map, or pick your state below for dates from its own frost dates. Zones 11 and above are frost-free, so timing there depends on heat and rain instead.
| Zone | Last / first frost | Start indoors | Sow or plant out |
|---|---|---|---|
| Zone 3 | May 15 / Sep 15 | Mar 13 – Mar 27 | May 22 – Jun 8 |
| Zone 4 | May 10 / Sep 25 | Mar 8 – Mar 22 | May 17 – Jun 3 |
| Zone 5 | Apr 30 / Oct 5 | Feb 26 – Mar 12 | May 7 – May 24 |
| Zone 6 | Apr 15 / Oct 15 | Feb 11 – Feb 25 | Apr 22 – May 9 |
| Zone 7 | Apr 5 / Oct 25 | Feb 1 – Feb 15 | Apr 12 – Apr 29 |
| Zone 8 | Mar 20 / Nov 5 | Jan 16 – Jan 30 | Mar 27 – Apr 13 |
| Zone 9 | Feb 20 / Nov 30 | Dec 19 – Jan 2 | Feb 27 – Mar 16 |
| Zone 10 | Jan 30 / Dec 15 | Nov 28 – Dec 12 | Feb 6 – Feb 23 |
Or browse chili pepper planting dates for every state as static pages.
Companions
Basil, Onion, Carrot, Okra
Bush Bean, Pole Bean, Cabbage
Common problems
Pests: aphids, flea beetle, pepper maggot, spider mite.
Diseases & disorders: bacterial leaf spot, anthracnose, phytophthora blight.
Same family (Solanaceae)
Rotate these so they don’t follow each other in the same bed year to year.
Questions gardeners ask
When should I plant chili peppers?
Start seeds indoors about 8 weeks before your last spring frost; plant out about 2 weeks after it. Wait until the soil is at least 65°F. The table on this page gives dates for each USDA zone, and the planting calendar gives dates for your own state or ZIP code.
How long do chili peppers take to grow?
About 70-100 days from transplanting to the first harvest, or roughly 20-24 weeks from sowing the seed indoors. Seeds germinate in 7-21 days.
How much sun do chili peppers need?
They need at least six to eight hours of direct sun a day.
What soil pH do chili peppers need?
A soil pH between 5.5 and 7.0. It tolerates fairly acidic soil better than most vegetables. Test before adding lime or sulfur - see the soil pH and testing guide.
How far apart should I plant chili peppers?
Space plants about 18 inches apart in rows 24 inches apart, or 1 per square foot in a square-foot bed. Sow seeds about ¼ inch deep.
Can I grow chili peppers in a container?
Yes. Use a container at least 10 inches deep with drainage holes and a good potting mix, and water more often than you would in the ground.
Figures are typical home-garden ranges from Cooperative Extension planting guides, cross-checked against multiple state sources. Your variety and conditions will vary.