USDA zone 8

What zone 8 means

USDA's Plant Hardiness Zone Map "is based on the average annual extreme minimum winter temperature," shown in 10°F zones and 5°F half zones (USDA ARS). USDA's ZIP code search labels the two halves of zone 8 like this:

Zone 8 takes in places as different as Raleigh, Dallas and Eugene, Oregon (USDA ZIP search, table below). In Florida, the 2023 map shows 8b in parts of the northern Panhandle, for example Jay (32565), Baker (32531) and Bonifay (32425), while Tallahassee (32301) and Pensacola (32501) are 9a. For your own address, use the ZIP search on USDA's map; every zone on this page was checked that way in October 2026.

Zone 8 does not set your frost dates

A zone is a winter-cold number for choosing perennials. Frost dates and season length come from NOAA's Climate Normals, which give the last spring and first fall 32°F freeze at stated probabilities. The hardiness zones guide explains the difference, and frost dates explained shows where to look up your station.

Six zone 8 cities, side by side

Zone: USDA ARS ZIP search for the downtown ZIP shown (2023 map, 2012 zone in brackets). Frost data: NOAA NCEI 1991–2020 normals, 32°F threshold. The 50% date is the median; a 10% spring date means a later freeze about 1 year in 10, and a 10% fall date a freeze that early about 1 year in 10 (NC State's guide to these tables).

Stations as NOAA names them: Dallas Ft Worth AP, Memphis Intl AP, Birmingham AP, Columbia, Raleigh Durham Intl AP, Eugene Mahlon Sweet AP. NC State calls the 90% season the conservative one: at least that long in about 9 years out of 10.

What the table shows:

• Median last spring freezes run from March 8 (Dallas) to April 11 (Eugene), 34 days apart.
• Dallas, Columbia and Eugene are all 8b, yet Dallas's median season is 66 days longer than Eugene's.
• Four of the six moved up a half zone between the 2012 and 2023 maps; Birmingham and Eugene did not. Their frost dates come from NOAA's normals either way.

Spring timing examples

Planting guides count from your own last frost date. UNH Extension's fact sheet sets lettuce transplants out 3–4 weeks before last frost, kale 4 weeks before, broccoli 2–4 weeks before, tomatoes and cucumbers 1–2 weeks after, and peppers, basil and squash 2 weeks after, with cucumber and squash seed sown when "soil warms to 70°F." Applied to the NOAA 50% dates of the earliest and latest city above (our arithmetic):

A grower who uses the 10% date instead (March 26 in Dallas, May 9 in Eugene) moves every row 18 days later in Dallas and 28 days later in Eugene. The planting calendar does this arithmetic for 25 crops.

Fall and winter: the cool-season garden

With first fall freezes from late October to late November, much of zone 8 can grow cool-season crops from late summer into winter. Texas A&M AgriLife's fall guide (Stein and Masabni) says "planting at the proper time is probably the most important factor in successful fall gardening." Its Table 3 matches Texas gardening Region III to USDA zone 8 (10–20°F), so its Region III column is a zone 8 column. Three extension guides, side by side:

UF/IFAS's "North" covers all of Florida north of State Road 40, much of it zone 9a on the 2023 map, so treat that column as the warm edge of zone 8. In western Oregon, an OSU Extension Master Gardener answer from Marion County says most greens and root crops for fall and winter harvest can be planted between late July and mid-August, and advises against late plantings of fruiting crops.

What the guides add:

• Group crops by frost tolerance. Texas A&M lists beet, broccoli, Brussels sprouts, cabbage, carrot, cauliflower, chard, collard, garlic, kale, lettuce, mustard, onion, parsley, spinach and turnip as frost-tolerant, and suggests planting frost-susceptible crops together so they can be removed after frost kills them.
• Late-summer heat is the first hurdle: UF/IFAS warns that vegetables planted in August or September face insects and diseases that thrive in hot weather. Texas A&M says transplants from small containers need at least 2 weeks for their roots to support active growth.
• Covers extend the season. UF/IFAS mentions row covers and similar structures and says to remove them when squash-family crops begin to flower; Texas A&M says to ventilate plastic covers during the day in the high 70s or above.
• Some greens prefer the cold: UF/IFAS says spinach "grows best only during the coolest months" and that warm temperatures make lettuce bitter.

Crop pages with container sizes: kale, spinach, lettuce; see also container sizes for vegetables.

Where the sources disagree

Using this page in a zone 8 garden

1. Confirm your half zone with USDA's ZIP search; four of the six cities above changed between the 2012 and 2023 maps.
2. Get frost dates for the station nearest you in distance and elevation, and pick a probability: NC State calls the 10% spring date the risk-averse choice.
3. Check a zone-keyed chart against your own dates; for four of the six cities, NOAA's median last freeze came before Virginia's range for the half zone.
4. Plan fall crops backward from your first fall freeze: sow or transplant brassicas in late summer, then greens and roots into fall, and garlic in October or November.
5. Compare one zone colder: the zone 7 page covers six more cities.