When to plant · 16 cities · zones 6a–7a
When to plant peppers in Missouri
Start Jalapeño seeds indoors around Feb 14 and transplant around Apr 18 — the Missouri statewide median, counted from a last spring frost of Apr 11 across 1,047 ZIP codes and 193 NOAA stations.
The rule: Eight weeks indoors on a heat mat (ten for habanero), then transplant one to two weeks after the last frost, once nights hold above 50 °F.
Missouri peppers, by cultivar
Statewide median last frost Apr 11, first fall frost Oct 25, 2027 season. Each cultivar's own indoor lead time and days to maturity, same engine as the Plan Builder.
| Cultivar | Start indoors | Plant out | First harvest | Days |
|---|---|---|---|---|
| JalapeñoEarly Jalapeño (Capsicum annuum) | Feb 14 | Apr 18 | Jul 2 | 75 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Feb 14 | Apr 18 | Jul 2 | 75 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Feb 14 | Apr 18 | Jul 7 | 80 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Feb 14 | Apr 18 | Jul 7 | 80 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Jan 31 | Apr 25 | Jul 29 | 95 from transplant |
Tight means first harvest lands within two weeks of the median first fall frost. Statewide dates are the ZIP-weighted median of every NOAA 1991–2020 station Missouri's ZIP codes resolve to.
Peppers in Missouri, city by city
Jalapeño, scheduled from each city's nearest NOAA station — the same dates as its frost page.
| City | Last frost | Start indoors | Plant out | First harvest |
|---|---|---|---|---|
| Kansas Cityzone 6b | Apr 4 | Feb 7 | Apr 11 | Jun 25 |
| St. Louiszone 7a | Apr 1 | Feb 4 | Apr 8 | Jun 22 |
| Springfieldzone 7a | Apr 9 | Feb 12 | Apr 16 | Jun 30 |
| Columbiazone 6b | Apr 5 | Feb 8 | Apr 12 | Jun 26 |
| Independencezone 6b | Apr 10 | Feb 13 | Apr 17 | Jul 1 |
| Lee's Summitzone 6b | Apr 7 | Feb 10 | Apr 14 | Jun 28 |
| O'Fallonzone 6b | Apr 10 | Feb 13 | Apr 17 | Jul 1 |
| St. Charleszone 6b | Apr 8 | Feb 11 | Apr 15 | Jun 29 |
| St. Josephzone 6a | Apr 19 | Feb 22 | Apr 26 | Jul 10 |
| St. Peterszone 6b | Apr 9 | Feb 12 | Apr 16 | Jun 30 |
| Blue Springszone 6b | Apr 7 | Feb 10 | Apr 14 | Jun 28 |
| Joplinzone 7a | Apr 9 | Feb 12 | Apr 16 | Jun 30 |
| Florissantzone 7a | Apr 2 | Feb 5 | Apr 9 | Jun 23 |
| Chesterfieldzone 7a | Apr 4 | Feb 7 | Apr 11 | Jun 25 |
| Wentzvillezone 6b | Apr 10 | Feb 13 | Apr 17 | Jul 1 |
| Jefferson Cityzone 6b | Apr 10 | Feb 13 | Apr 17 | Jul 1 |
What these peppers become
What Missouri peppers need
Jalapeño Pepper Seed
The one you smoke into chipotle. Left on the plant to red and corked, then cold-smoked, a jalapeño stops being a taco garnish and becomes the backbone of an adobo.
Organic Cayenne (Long Slim) Seed
The long, thin, wall-thin cayenne that dries in a week and grinds to a clean red powder. If you want flakes and powder as well as sauce, this is the plant that does both.
Serrano Pepper Seed
Cleaner and greener than a jalapeño at roughly three times the heat. The correct chile for salsa verde and zhoug, where you want brightness rather than smoke.
Marconi Red Sweet Pepper Seed
A long Italian sweet pepper that roasts and peels far better than a bell. Romesco and any red-pepper paste wants this, not a supermarket bell.
Habanero Orange Pepper SeedMust have
The workhorse superhot for sauce: 100,000–350,000 SHU with a genuine apricot-floral top note that survives fermentation. Nothing else in this range tastes like fruit instead of pure burn.
Organic Seed Starter Potting MixMust have
Seed-starting mix is not potting soil with a nicer label — it is finer, lighter, and low in nutrients on purpose, because a seedling's first roots want air and moisture, not fertiliser.
Seedling Heat Mat + Digital ThermostatMust have
Peppers germinate on soil temperature, not air temperature. At 65 °F a habanero takes a month and half of them rot; at 85 °F it is up in eight days. The thermostat is the half that matters.
T8 Full-Spectrum Grow Lights, 1 ft 4-packMust have
A south window in March delivers a fraction of the light a pepper seedling needs, and the plant tells you by stretching. Two inches of LED above the canopy for 16 hours a day fixes it permanently.
72-Cell Trays with 1020 Bottoms, 5-PackMust have
The cheap black nursery trays crack after one season and flex enough to break roots when you lift them. These do not. Over five seasons the price per use is lower than the throwaways.
5-Gallon Fabric Grow Bags, 5-Pack
Fabric pots air-prune roots and drain faster than a plastic pot can, which is the entire reason container tomatoes fail. Five gallons is the honest minimum for a pepper; a tomato wants ten.
Ocean Forest Potting SoilMust have
Pre-charged with enough nutrition to carry a transplant for its first month without feeding, which is exactly the window when most container plants stall.
Organic Tomato-Tone 3-4-6 with 8% CalciumMust have
The NPK ratio is the point: low nitrogen, higher potassium. Feed a tomato a high-nitrogen lawn fertiliser and you get a magnificent six-foot plant with four tomatoes on it.
Rot-Stop Blossom End Rot Concentrate
Blossom end rot is almost never a soil calcium shortage — it is a calcium *transport* failure caused by inconsistent water. A foliar calcium spray buys time while you fix the watering, which is the real cure.
6" Micro-Tip Pruning SnipsMust have
Ninety percent of sauce-garden cutting is snipping a pepper stem or a basil node, and a fine-tipped snip does it better than any pruner. Pulling peppers by hand tears the branch.
Nitrile Exam Gloves, 200 pcs, food-safeMust have
Capsaicin is oil-soluble and does not wash off with soap. Seeding a pound of habaneros bare-handed means eight hours of burning hands and one unforgettable mistake involving your own eye.
Pellet Smoker Tube, 12", Set of 2
Chipotle is nothing but a red jalapeño that has been cold-smoked for hours. A pellet tube turns any covered grill into a cold smoker for eighteen dollars.
Food Dehydrator, 6 Stainless Trays
Sun-drying chiles works in Oaxaca and fails in Ohio — humidity lets mould win the race. Controlled 125 °F airflow dries a full cayenne harvest overnight, every time.
One-Touch Coffee & Spice Grinder
Dried cayenne into powder in fifteen seconds. Dedicate one to chiles — grind coffee in it afterwards and you will find out exactly how well capsaicin sticks to plastic.
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Peppers in Missouri: questions
When should I plant peppers in Missouri?
Transplant around Apr 18 at the statewide median; across the state that date runs from Apr 9 in the warmest tenth of Missouri's ZIP codes to Apr 26 in the coldest. To cut the freeze risk to one year in ten, count from Apr 28 instead of the median last frost. Use the city table for your own town.
When do I start peppers seeds indoors in Missouri?
Around Feb 14 for Jalapeño: 8 weeks before the statewide median last frost, on soil held at 75–85 °F.
When is the last frost in Missouri?
The ZIP-weighted median of NOAA 1991–2020 station medians is Apr 11. In the warmest tenth of Missouri's ZIP codes the median last frost falls on or before Apr 2; in the coldest tenth, on or after Apr 19.
When will Missouri peppers be ready to harvest?
Jalapeño planted on the statewide date is ready around Jul 2: 75 days from transplant.
More for Missouri
- When to plant tomatoes
- When to plant tomatillos
- When to plant basil
- When to plant onions
- When to plant cilantro
- When to plant carrots
- When to plant mustard greens
Peppers in every state → · Missouri frost dates → · How frost-date math works →