When to plant · 31 cities · zones 7a–9a
When to plant peppers in Washington
Start Jalapeño seeds indoors around Feb 17 and transplant around Apr 21 — the Washington statewide median, counted from a last spring frost of Apr 14 across 597 ZIP codes and 156 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.
Washington peppers, by cultivar
Statewide median last frost Apr 14, 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 17 | Apr 21 | Jul 5 | 75 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Feb 17 | Apr 21 | Jul 5 | 75 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Feb 17 | Apr 21 | Jul 10 | 80 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Feb 17 | Apr 21 | Jul 10 | 80 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Feb 3 | Apr 28 | Aug 1 | 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 Washington's ZIP codes resolve to; 5 of 602 ZIPs have no datable freeze and are left out.
Peppers in Washington, 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 |
|---|---|---|---|---|
| Seattlezone 9a | Mar 13 | Jan 16 | Mar 20 | Jun 3 |
| Spokanezone 7a | Apr 26 | Mar 1 | May 3 | Jul 17 |
| Tacomazone 8b | Mar 8 | Jan 11 | Mar 15 | May 29 |
| Vancouverzone 8b | Mar 29 | Feb 1 | Apr 5 | Jun 19 |
| Bellevuezone 9a | Mar 8 | Jan 11 | Mar 15 | May 29 |
| Kentzone 8b | Mar 20 | Jan 23 | Mar 27 | Jun 10 |
| Everettzone 8b | Mar 24 | Jan 27 | Mar 31 | Jun 14 |
| Spokane Valleyzone 7a | Apr 26 | Mar 1 | May 3 | Jul 17 |
| Rentonzone 9a | Mar 13 | Jan 16 | Mar 20 | Jun 3 |
| Federal Wayzone 8b | Mar 8 | Jan 11 | Mar 15 | May 29 |
| Yakimazone 7a | Apr 8 | Feb 11 | Apr 15 | Jun 29 |
| Bellinghamzone 8b | Apr 1 | Feb 4 | Apr 8 | Jun 22 |
| Kirklandzone 9a | Mar 8 | Jan 11 | Mar 15 | May 29 |
| Kennewickzone 7b | Mar 28 | Jan 31 | Apr 4 | Jun 18 |
| Auburnzone 8b | Mar 20 | Jan 23 | Mar 27 | Jun 10 |
| Redmondzone 8b | Mar 8 | Jan 11 | Mar 15 | May 29 |
| Pascozone 7b | Mar 28 | Jan 31 | Apr 4 | Jun 18 |
| Marysvillezone 8b | Mar 24 | Jan 27 | Mar 31 | Jun 14 |
| Sammamishzone 8b | Mar 30 | Feb 2 | Apr 6 | Jun 20 |
| Shorelinezone 9a | Mar 8 | Jan 11 | Mar 15 | May 29 |
| Richlandzone 7b | Apr 6 | Feb 9 | Apr 13 | Jun 27 |
| Lakewoodzone 8b | Mar 8 | Jan 11 | Mar 15 | May 29 |
| Laceyzone 8b | Apr 29 | Mar 4 | May 6 | Jul 20 |
| Olympiazone 8b | Apr 29 | Mar 4 | May 6 | Jul 20 |
| Burienzone 9a | Mar 2 | Jan 5 | Mar 9 | May 23 |
| Bothellzone 8b | Mar 8 | Jan 11 | Mar 15 | May 29 |
| Bremertonzone 8b | Mar 29 | Feb 1 | Apr 5 | Jun 19 |
| Edmondszone 9a | Mar 9 | Jan 12 | Mar 16 | May 30 |
| Puyallupzone 8b | Apr 11 | Feb 14 | Apr 18 | Jul 2 |
| Lynnwoodzone 9a | Mar 9 | Jan 12 | Mar 16 | May 30 |
| Lake Stevenszone 8b | Mar 24 | Jan 27 | Mar 31 | Jun 14 |
What these peppers become
What Washington 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 Washington: questions
When should I plant peppers in Washington?
Transplant around Apr 21 at the statewide median; across the state that date runs from Mar 15 in the warmest tenth of Washington's ZIP codes to May 20 in the coldest. To cut the freeze risk to one year in ten, count from May 5 instead of the median last frost. Use the city table for your own town.
When do I start peppers seeds indoors in Washington?
Around Feb 17 for Jalapeño: 8 weeks before the statewide median last frost, on soil held at 75–85 °F.
When is the last frost in Washington?
The ZIP-weighted median of NOAA 1991–2020 station medians is Apr 14. In the warmest tenth of Washington's ZIP codes the median last frost falls on or before Mar 8; in the coldest tenth, on or after May 13.
When will Washington peppers be ready to harvest?
Jalapeño planted on the statewide date is ready around Jul 5: 75 days from transplant.
More for Washington
- 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 → · Washington frost dates → · How frost-date math works →