When to plant · 31 cities · zones 7a–9a

When to plant tomatillos in Washington

Start Tomatillo seeds indoors around Mar 3 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.

Mar 3Start indoors6 weeks before last frost
Apr 21Plant outMar 15 – May 20 across the state
Apr 14Last spring frostmedian · 1 in 10 years after May 5
Jun 30First harvest70 days from transplant

The rule: Six weeks indoors, transplant after the last frost, and give each plant 30 inches and a large cage.

Washington tomatillos, by step

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
TomatilloToma VerdeMar 3Apr 21Jun 3070 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.

Tomatillos in Washington, city by city

Tomatillo, scheduled from each city's nearest NOAA station — the same dates as its frost page.

CityLast frostStart indoorsPlant outFirst harvest
Seattlezone 9aMar 13Jan 30Mar 20May 29
Spokanezone 7aApr 26Mar 15May 3Jul 12
Tacomazone 8bMar 8Jan 25Mar 15May 24
Vancouverzone 8bMar 29Feb 15Apr 5Jun 14
Bellevuezone 9aMar 8Jan 25Mar 15May 24
Kentzone 8bMar 20Feb 6Mar 27Jun 5
Everettzone 8bMar 24Feb 10Mar 31Jun 9
Spokane Valleyzone 7aApr 26Mar 15May 3Jul 12
Rentonzone 9aMar 13Jan 30Mar 20May 29
Federal Wayzone 8bMar 8Jan 25Mar 15May 24
Yakimazone 7aApr 8Feb 25Apr 15Jun 24
Bellinghamzone 8bApr 1Feb 18Apr 8Jun 17
Kirklandzone 9aMar 8Jan 25Mar 15May 24
Kennewickzone 7bMar 28Feb 14Apr 4Jun 13
Auburnzone 8bMar 20Feb 6Mar 27Jun 5
Redmondzone 8bMar 8Jan 25Mar 15May 24
Pascozone 7bMar 28Feb 14Apr 4Jun 13
Marysvillezone 8bMar 24Feb 10Mar 31Jun 9
Sammamishzone 8bMar 30Feb 16Apr 6Jun 15
Shorelinezone 9aMar 8Jan 25Mar 15May 24
Richlandzone 7bApr 6Feb 23Apr 13Jun 22
Lakewoodzone 8bMar 8Jan 25Mar 15May 24
Laceyzone 8bApr 29Mar 18May 6Jul 15
Olympiazone 8bApr 29Mar 18May 6Jul 15
Burienzone 9aMar 2Jan 19Mar 9May 18
Bothellzone 8bMar 8Jan 25Mar 15May 24
Bremertonzone 8bMar 29Feb 15Apr 5Jun 14
Edmondszone 9aMar 9Jan 26Mar 16May 25
Puyallupzone 8bApr 11Feb 28Apr 18Jun 27
Lynnwoodzone 9aMar 9Jan 26Mar 16May 25
Lake Stevenszone 8bMar 24Feb 10Mar 31Jun 9

What Washington tomatillos need

SeedsThe cultivar decides the sauce. Everything downstream is damage control.
  • Toma Verde Tomatillo SeedMust have

    Salsa verde is not a green tomato sauce — it is a tomatillo sauce, and the difference is the tartness and the natural pectin that makes it cling. There is no substitute.

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.

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.

  • 58" Square Tomato Cages, 3-PackMust have

    The conical wire tomato ring from the hardware store is 33 inches tall and an indeterminate San Marzano will laugh at it in July. Height and square geometry are what actually hold a loaded plant.

HarvestTiming, handling, and weighing what you actually got.
  • Garden Harvest Basket with Tool Caddy

    A harvest basket that doubles as a colander means the hose rinse happens in the garden, and the dirt stays outside. On a 20-pound tomato day that is a genuine time saving.

CookReduction, texture, and the non-reactive pans that keep tomato tasting like tomato.
  • Stainless Steel Food Mill, 3 discsMust have

    A blender pulverises tomato skins and seeds into the sauce, which is where bitterness comes from. A mill separates them out — no blanching, no peeling, no ice bath. It removes an entire hour from sauce day.

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Tomatillos in Washington: questions

When should I plant tomatillos 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 tomatillos seeds indoors in Washington?

Around Mar 3 for Tomatillo: 6 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 tomatillos be ready to harvest?

Tomatillo planted on the statewide date is ready around Jun 30: 70 days from transplant.

More for Washington

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