Plants by Numbers

All zones /

8a Planting calendar for zone 8a

USDA hardiness zone 8a: average annual extreme minimum 10°F to 15°F. 3,430 US ZIP codes fall in this zone.

Freeze dates for zone 8a

Median dates across 791 NOAA weather stations in zone 8a (1991–2020 normals). In zone 8a, the average coldest night of the year falls between 10°F and 15°F.

ThresholdLast spring freeze (median)Typical rangeFirst fall freeze (median)Typical range
36°F (light freeze — tender plants hurt)Apr 12Apr 5 – Apr 28Oct 26Oct 17 – Nov 2
32°F (freeze)Apr 2Mar 25 – Apr 16Nov 5Oct 26 – Nov 12
28°F (hard freeze)Mar 19Mar 9 – Apr 1Nov 16Nov 6 – Nov 27

Growing season at 32°F (50% probability): —.

Planting calendar — zone 8a

Cropjanfebmaraprmayjunjulaugsepoctnovdec
Tomatoes·SS
D
T········
Peppers·S·T········
Cucumbers··S
D
T········
Zucchini & Summer Squash··S
D
T········
Winter Squash & Pumpkins··S
D
T········
Snap Beans··D·····F···
Sweet Corn··D·········
Peas·D······F···
Lettuce··S
D
T····F···
Spinach·D······F···
Carrots··D····F····
Radishes·D······F···
Broccoli·SS
D
T····F···
Garlic········F···
Potatoes··D·········

S = start seeds indoors · T = transplant outside · D = direct sow · F = fall planting

Every crop, zone 8a