Find your planting zone

Search a ZIP code or town, or tap the map. You get the 2023 USDA zone, local frost dates and when to plant.

New YorkChicagoHoustonAtlantaDenverSeattlePhoenixBoston
Coldest winter nightTap the map for a zone
−60 °F · 1a0 °F · 7a+70 °F · 13b

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. Official map: planthardiness.ars.usda.gov.

40,483ZIP codes, each with its own page
26half-zones, from 1a to 13b
6,518NOAA stations behind the frost dates
58%of ZIP codes changed zone since 2012

Choose your state

Hover or tap a state to preview its zones and frost dates.

Small states:CT6a–7bDE7a–8aDC7b–8aMA5b–7bNH4a–6bNJ6b–8aRI6b–7bVT4a–6a

Each state is colored by its most common 2023 USDA zone. Hover or tap a state, then open it for the zone of every town and ZIP code.

Alabama7b–9bAlaska1a–8bArizona5b–10aArkansas7a–8bCalifornia5b–11aColorado4a–7aConnecticut6a–7bDelaware7a–8aDistrict of Columbia7b–8aFlorida8b–11bGeorgia7a–9aHawaii10b–13aIdaho4a–7bIllinois5a–7aIndiana5b–7aIowa4b–6aKansas6a–7aKentucky6b–7bLouisiana8b–10aMaine3b–7aMaryland6a–8aMassachusetts5b–7bMichigan4a–7aMinnesota3a–5aMississippi7b–9aMissouri5b–8aMontana3b–6bNebraska5a–6aNevada5a–10aNew Hampshire4a–6bNew Jersey6b–8aNew Mexico5a–8bNew York4a–7bNorth Carolina6b–9aNorth Dakota3b–4bOhio6a–7aOklahoma6b–8aOregon5b–9bPennsylvania5b–8aPuerto Rico11b–13bRhode Island6b–7bSouth Carolina8a–9bSouth Dakota4a–5bTennessee6b–8aTexas6b–10bUtah4a–8bVermont4a–6aVirginia6a–8bWashington6a–9bWest Virginia5b–7aWisconsin3b–6aWyoming4a–5b

Planting zones in big cities

Zone and median frost dates. Tap a city for every ZIP code and its planting calendar.

New York7b
Last frost Mar 30 · first Nov 20 · 136 ZIPs
Los Angeles10a 10b
Frost rare · 92 ZIPs
Chicago6a 6b
Last frost Apr 10 · first Nov 5 · 80 ZIPs
Houston9b
Last frost Feb 13 · first Dec 9 · 178 ZIPs
Phoenix9b 10a
Frost rare · 74 ZIPs
Philadelphia7b
Last frost Mar 30 · first Nov 17 · 87 ZIPs
San Antonio8b 9a
Last frost Feb 25 · first Nov 28 · 82 ZIPs
San Diego10a 10b 11a
Frost rare · 73 ZIPs
Dallas8b
Last frost Mar 2 · first Nov 29 · 104 ZIPs
Austin8b 9a
Last frost Feb 20 · first Dec 3 · 73 ZIPs
Denver6a
Last frost Apr 30 · first Oct 12 · 59 ZIPs
Seattle9a
Last frost Mar 13 · first Nov 17 · 59 ZIPs
Atlanta8a 8b
Last frost Mar 24 · first Nov 8 · 89 ZIPs
Boston6b 7a
Last frost Apr 4 · first Nov 9 · 34 ZIPs
Portland8b 9a
Last frost Feb 25 · first Dec 1 · 59 ZIPs
Minneapolis5a
Last frost Apr 23 · first Oct 16 · 66 ZIPs
Nashville7b
Last frost Apr 1 · first Oct 31 · 36 ZIPs
Charlotte8a
Last frost Mar 30 · first Nov 3 · 73 ZIPs

The 26 hardiness zones

Coldest winter night and number of ZIP codes.

1a−60 to −55 °F51b−55 to −50 °F112a−50 to −45 °F272b−45 to −40 °F173a−40 to −35 °F233b−35 to −30 °F2304a−30 to −25 °F8144b−25 to −20 °F1,2845a−20 to −15 °F2,4265b−15 to −10 °F2,8806a−10 to −5 °F5,1876b−5 to 0 °F5,2717a0 to 5 °F4,8777b5 to 10 °F3,8558a10 to 15 °F3,4138b15 to 20 °F3,3799a20 to 25 °F2,1999b25 to 30 °F2,08510a30 to 35 °F1,23410b35 to 40 °F75211a40 to 45 °F20511b45 to 50 °F1612a50 to 55 °F3012b55 to 60 °F13613a60 to 65 °F10113b65 to 70 °F26

Did your zone change?

The 2023 map uses 1991–2020 weather instead of 1976–2005. Compared ZIP by ZIP (40,292 ZIP codes):

42%56%
Colder 1.1%Same zone 41.7%½ zone warmer 55.9%1 zone warmer 1.3%More 0.1%

Part of the change comes from more weather stations and better mapping, not only warmer winters. Every ZIP page shows the old and new zone.

How to use your zone

Choose perennials

Trees, shrubs and perennials labeled “hardy to zone X” survive winters in zone X and colder-numbered zones. Pick plants rated for your zone or lower.

Check frost dates

The zone says nothing about when to plant. Annual vegetables follow the last spring frost and first fall frost, shown on every ZIP page.

Plan the season

The planting calendar turns those dates into windows: when to start tomatoes indoors, when to sow peas, when to plant garlic.

Frequently asked questions

What planting zone am I in?

Type your ZIP code or town in the search box, or tap the map. The zone comes from the 2023 USDA hardiness-zone data (PRISM Group, Oregon State University), based on the coldest night of an average winter in 1991–2020.

What is a planting zone?

A planting zone (USDA plant hardiness zone) is a 10 °F band of the average coldest winter night, split into “a” and “b” halves of 5 °F. It tells you which perennials, shrubs and trees survive your winters.

Did my zone change in 2023?

For 58% of U.S. ZIP codes the 2023 zone differs from the 2012 map; 57% moved to a warmer zone. Every ZIP page shows both.

When is the last frost in my area?

Each ZIP page shows the median last spring frost and first fall frost (32 °F) of the nearest NOAA weather station, from the 1991–2020 climate normals, plus the date after which frost risk drops to 10%.

Is this the official USDA map?

No. The zones come from the official 2023 USDA dataset, but this map is re-colored and re-projected by us. The official map is at planthardiness.ars.usda.gov.

What zone has the most ZIP codes?

Zone 6b — 5,271 of 40,483 ZIP codes.

About the data

Zones: the 2023 USDA Plant Hardiness Zone Map data, produced by the PRISM Group at Oregon State University (zone for each ZIP code and the 800 m grid). Frost dates: NOAA NCEI U.S. Climate Normals 1991–2020, from the nearest of 6,518 stations to each ZIP code. ZIP locations: U.S. Census ZCTA points and GeoNames. Methodology, sources and CSV download →