When to plant · 26 cities · zones 6a–10a

When to plant peppers in Arizona

Start Jalapeño seeds indoors around Dec 24 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.

Dec 24Start indoors8 weeks before last frost
Feb 25Plant outJan 14 – May 22 across the state
Feb 18Last spring frostmedian · 1 in 10 years after Mar 11
May 11First 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.

Arizona peppers, by cultivar

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.

CultivarStart indoorsPlant outFirst harvestDays
JalapeñoEarly Jalapeño (Capsicum annuum)Dec 24Feb 25May 1175 from transplant
CayenneLong Slim Cayenne (Capsicum annuum)Dec 24Feb 25May 1175 from transplant
SerranoSerrano Tampiqueño (Capsicum annuum)Dec 24Feb 25May 1680 from transplant
Marconi Red PepperMarconi Red (Capsicum annuum)Dec 24Feb 25May 1680 from transplant
HabaneroOrange Habanero (Capsicum chinense)Dec 10Mar 4Jun 795 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.

Peppers in Arizona, city by city

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

CityLast frostStart indoorsPlant outFirst harvest
Phoenixzone 9bJan 8Nov 13Jan 15Mar 31
Tucsonzone 9bFeb 5Dec 11Feb 12Apr 28
Mesazone 9bFeb 1Dec 7Feb 8Apr 24
Gilbertzone 9bFeb 1Dec 7Feb 8Apr 24
Chandlerzone 9bFeb 1Dec 7Feb 8Apr 24
Glendalezone 9bJan 20Nov 25Jan 27Apr 12
Scottsdalezone 10aJan 27Dec 2Feb 3Apr 19
Peoriazone 9bFeb 5Dec 11Feb 12Apr 28
Tempezone 10aFeb 13Dec 19Feb 20May 6
Surprisezone 9bFeb 5Dec 11Feb 12Apr 28
Goodyearzone 9bJan 7Nov 12Jan 14Mar 30
Buckeyezone 9bJan 7Nov 12Jan 14Mar 30
Yumazone 10afrost rareDec 6Feb 7Apr 23
Avondalezone 9bJan 7Nov 12Jan 14Mar 30
Queen Creekzone 9bFeb 1Dec 7Feb 8Apr 24
Flagstaffzone 6aJun 4Apr 9Jun 11Aug 25
Maricopazone 9aFeb 23Dec 29Mar 2May 16
Casa Grandezone 9aFeb 5Dec 11Feb 12Apr 28
Maranazone 9bApr 2Feb 5Apr 9Jun 23
Lake Havasu Cityzone 10aJan 5Nov 10Jan 12Mar 28
Prescott Valleyzone 7bApr 30Mar 5May 7Jul 21
Oro Valleyzone 9aApr 2Feb 5Apr 9Jun 23
Prescottzone 7bApr 30Mar 5May 7Jul 21
Sierra Vistazone 8bApr 18Feb 21Apr 25Jul 9
Apache Junctionzone 9bFeb 1Dec 7Feb 8Apr 24
Bullhead Cityzone 10aJan 4Nov 9Jan 11Mar 27

What Arizona 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 Arizona: questions

When should I plant peppers 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 peppers seeds indoors in Arizona?

Around Dec 24 for Jalapeño: 8 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 peppers be ready to harvest?

Jalapeño planted on the statewide date is ready around May 11: 75 days from transplant.

More for Arizona

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