Places

Counties

Planting zones, freeze dates and a spring calendar for 675 counties, parishes and boroughs across 48 states — the smaller places that fall outside every metro area, where most of the country's ZIP codes actually are.

Coverage

Which counties have a page, and why not all of them

39% of these counties fall inside a single hardiness zone — 265 of 675. That is the strongest claim this site can make and it is far more often available here than at metro scale, where only 91 of 388 are single-zone. Where a county spans several, its page gives the split by ZIP code rather than rounding everyone into the largest.

A county earns a page when it holds at least 5 ZIP codes, its ZIP codes cite at least 4 NOAA weather stations, and it sits mostly outside every metro area. The first two rules are about substance, and both were set by measuring the finished pages rather than guessed: below them a page carries too few published figures to say anything a neighbouring county's would not. The third avoids two of our own pages competing for one question — where a county is mostly inside a metro, the metro page already covers it, and splitting the answer between two pages helps nobody.

Between them these pages reach 8,258 ZIP codes that have a NOAA station in range. For a whole state, see the state pages; for a ZIP code, every tool answers at that grain directly.

All 675 counties

Alabama

Alaska

Hoonah-Angoon Census Area 7a
Kenai Peninsula Borough 4b–6b
Lake and Peninsula Borough 4a–6b
Prince of Wales-Hyder Census Area 6b, 7b, 8a
Southeast Fairbanks Census Area 1b–3b
Yukon-Koyukuk Census Area 1a–3b

Arizona

Apache County 6a–7a
Gila County 7a, 8a, 8b, 9a
Graham County 8b–9a
La Paz County 9a–9b
Navajo County 6b–7b
Santa Cruz County 8a–8b

Arkansas