When to plant · 26 cities · zones 6a–10a
When to plant tomatillos in Arizona
Start Tomatillo seeds indoors around Jan 7 and transplant around Feb 25 — the Arizona statewide median, counted from a last spring frost of Feb 18 across 413 ZIP codes and 148 NOAA stations.
The rule: Six weeks indoors, transplant after the last frost, and give each plant 30 inches and a large cage.
Arizona tomatillos, by step
Statewide median last frost Feb 18, first fall frost Dec 1, 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 |
|---|---|---|---|---|
| TomatilloToma Verde | Jan 7 | Feb 25 | May 6 | 70 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 Arizona's ZIP codes resolve to; 3 of 416 ZIPs have no datable freeze and are left out.
Tomatillos in Arizona, city by city
Tomatillo, scheduled from each city's nearest NOAA station — the same dates as its frost page.
| City | Last frost | Start indoors | Plant out | First harvest |
|---|---|---|---|---|
| Phoenixzone 9b | Jan 8 | Nov 27 | Jan 15 | Mar 26 |
| Tucsonzone 9b | Feb 5 | Dec 25 | Feb 12 | Apr 23 |
| Mesazone 9b | Feb 1 | Dec 21 | Feb 8 | Apr 19 |
| Gilbertzone 9b | Feb 1 | Dec 21 | Feb 8 | Apr 19 |
| Chandlerzone 9b | Feb 1 | Dec 21 | Feb 8 | Apr 19 |
| Glendalezone 9b | Jan 20 | Dec 9 | Jan 27 | Apr 7 |
| Scottsdalezone 10a | Jan 27 | Dec 16 | Feb 3 | Apr 14 |
| Peoriazone 9b | Feb 5 | Dec 25 | Feb 12 | Apr 23 |
| Tempezone 10a | Feb 13 | Jan 2 | Feb 20 | May 1 |
| Surprisezone 9b | Feb 5 | Dec 25 | Feb 12 | Apr 23 |
| Goodyearzone 9b | Jan 7 | Nov 26 | Jan 14 | Mar 25 |
| Buckeyezone 9b | Jan 7 | Nov 26 | Jan 14 | Mar 25 |
| Yumazone 10a | frost rare | Dec 20 | Feb 7 | Apr 18 |
| Avondalezone 9b | Jan 7 | Nov 26 | Jan 14 | Mar 25 |
| Queen Creekzone 9b | Feb 1 | Dec 21 | Feb 8 | Apr 19 |
| Flagstaffzone 6a | Jun 4 | Apr 23 | Jun 11 | Aug 20 |
| Maricopazone 9a | Feb 23 | Jan 12 | Mar 2 | May 11 |
| Casa Grandezone 9a | Feb 5 | Dec 25 | Feb 12 | Apr 23 |
| Maranazone 9b | Apr 2 | Feb 19 | Apr 9 | Jun 18 |
| Lake Havasu Cityzone 10a | Jan 5 | Nov 24 | Jan 12 | Mar 23 |
| Prescott Valleyzone 7b | Apr 30 | Mar 19 | May 7 | Jul 16 |
| Oro Valleyzone 9a | Apr 2 | Feb 19 | Apr 9 | Jun 18 |
| Prescottzone 7b | Apr 30 | Mar 19 | May 7 | Jul 16 |
| Sierra Vistazone 8b | Apr 18 | Mar 7 | Apr 25 | Jul 4 |
| Apache Junctionzone 9b | Feb 1 | Dec 21 | Feb 8 | Apr 19 |
| Bullhead Cityzone 10a | Jan 4 | Nov 23 | Jan 11 | Mar 22 |
What Arizona tomatillos need
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.
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.
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.
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.
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 Arizona: questions
When should I plant tomatillos in Arizona?
Transplant around Feb 25 at the statewide median; across the state that date runs from Jan 14 in the warmest tenth of Arizona's ZIP codes to May 22 in the coldest. To cut the freeze risk to one year in ten, count from Mar 11 instead of the median last frost. Use the city table for your own town.
When do I start tomatillos seeds indoors in Arizona?
Around Jan 7 for Tomatillo: 6 weeks before the statewide median last frost, on soil held at 75–85 °F.
When is the last frost in Arizona?
The ZIP-weighted median of NOAA 1991–2020 station medians is Feb 18. In the warmest tenth of Arizona's ZIP codes the median last frost falls on or before Jan 7; in the coldest tenth, on or after May 15.
When will Arizona tomatillos be ready to harvest?
Tomatillo planted on the statewide date is ready around May 6: 70 days from transplant.
More for Arizona
- When to plant tomatoes
- When to plant peppers
- When to plant basil
- When to plant cilantro
- When to plant carrots
- When to plant mustard greens
Tomatillos in every state → · Arizona frost dates → · How frost-date math works →