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.

Feb 17Start indoors8 weeks before last frost
Apr 21Plant outMar 15 – May 20 across the state
Apr 14Last spring frostmedian · 1 in 10 years after May 5
Jul 5First harvest75 days from transplant

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.

CultivarStart indoorsPlant outFirst harvestDays
JalapeñoEarly Jalapeño (Capsicum annuum)Feb 17Apr 21Jul 575 from transplant
CayenneLong Slim Cayenne (Capsicum annuum)Feb 17Apr 21Jul 575 from transplant
SerranoSerrano Tampiqueño (Capsicum annuum)Feb 17Apr 21Jul 1080 from transplant
Marconi Red PepperMarconi Red (Capsicum annuum)Feb 17Apr 21Jul 1080 from transplant
HabaneroOrange Habanero (Capsicum chinense)Feb 3Apr 28Aug 195 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.

CityLast frostStart indoorsPlant outFirst harvest
Seattlezone 9aMar 13Jan 16Mar 20Jun 3
Spokanezone 7aApr 26Mar 1May 3Jul 17
Tacomazone 8bMar 8Jan 11Mar 15May 29
Vancouverzone 8bMar 29Feb 1Apr 5Jun 19
Bellevuezone 9aMar 8Jan 11Mar 15May 29
Kentzone 8bMar 20Jan 23Mar 27Jun 10
Everettzone 8bMar 24Jan 27Mar 31Jun 14
Spokane Valleyzone 7aApr 26Mar 1May 3Jul 17
Rentonzone 9aMar 13Jan 16Mar 20Jun 3
Federal Wayzone 8bMar 8Jan 11Mar 15May 29
Yakimazone 7aApr 8Feb 11Apr 15Jun 29
Bellinghamzone 8bApr 1Feb 4Apr 8Jun 22
Kirklandzone 9aMar 8Jan 11Mar 15May 29
Kennewickzone 7bMar 28Jan 31Apr 4Jun 18
Auburnzone 8bMar 20Jan 23Mar 27Jun 10
Redmondzone 8bMar 8Jan 11Mar 15May 29
Pascozone 7bMar 28Jan 31Apr 4Jun 18
Marysvillezone 8bMar 24Jan 27Mar 31Jun 14
Sammamishzone 8bMar 30Feb 2Apr 6Jun 20
Shorelinezone 9aMar 8Jan 11Mar 15May 29
Richlandzone 7bApr 6Feb 9Apr 13Jun 27
Lakewoodzone 8bMar 8Jan 11Mar 15May 29
Laceyzone 8bApr 29Mar 4May 6Jul 20
Olympiazone 8bApr 29Mar 4May 6Jul 20
Burienzone 9aMar 2Jan 5Mar 9May 23
Bothellzone 8bMar 8Jan 11Mar 15May 29
Bremertonzone 8bMar 29Feb 1Apr 5Jun 19
Edmondszone 9aMar 9Jan 12Mar 16May 30
Puyallupzone 8bApr 11Feb 14Apr 18Jul 2
Lynnwoodzone 9aMar 9Jan 12Mar 16May 30
Lake Stevenszone 8bMar 24Jan 27Mar 31Jun 14

What Washington peppers need

SeedsThe cultivar decides the sauce. Everything downstream is damage control.
  • 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.

StartSoil temperature and light intensity, indoors, weeks before your frost date.
  • 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.

GrowRoot volume, nutrition and structure. Where most home crops actually fail.
  • 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.

HarvestTiming, handling, and weighing what you actually got.
  • 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.

CookReduction, texture, and the non-reactive pans that keep tomato tasting like tomato.
  • 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

Peppers in every state → · Washington frost dates → · How frost-date math works →