Most of zone 10 sees little or no frost, so the calendar turns around: warm-season flowers and crops go in from late winter to spring, and cool-season ones such as pansies, snapdragons, lettuce and broccoli are planted in fall for winter and spring.
| Plant | Zone 10a |
|---|---|
| Zinnia | Fall to winter for cool-season, late winter to spring for warm-season |
| French marigold | Fall to winter for cool-season, late winter to spring for warm-season |
| Petunia | Fall to winter for cool-season, late winter to spring for warm-season |
| Cosmos | Fall to winter for cool-season, late winter to spring for warm-season |
| Sunflower | Fall to winter for cool-season, late winter to spring for warm-season |
| Impatiens | Fall to winter for cool-season, late winter to spring for warm-season |
| Wax begonia | Fall to winter for cool-season, late winter to spring for warm-season |
| Zonal geranium | Fall to winter for cool-season, late winter to spring for warm-season |
| Snapdragon | Fall to winter for cool-season, late winter to spring for warm-season |
| Pansy | Fall to winter for cool-season, late winter to spring for warm-season |
| Sweet alyssum | Fall to winter for cool-season, late winter to spring for warm-season |
| Celosia | Fall to winter for cool-season, late winter to spring for warm-season |
| Scarlet sage | Fall to winter for cool-season, late winter to spring for warm-season |
| Lantana | Fall to winter for cool-season, late winter to spring for warm-season |
| Madagascar periwinkle | Fall to winter for cool-season, late winter to spring for warm-season |
| Nasturtium | Fall to winter for cool-season, late winter to spring for warm-season |
| Sweet pea | Fall to winter for cool-season, late winter to spring for warm-season |
| Larkspur | Fall to winter for cool-season, late winter to spring for warm-season |
| Pot marigold | Fall to winter for cool-season, late winter to spring for warm-season |
| Coleus | Fall to winter for cool-season, late winter to spring for warm-season |
| Garden verbena | Fall to winter for cool-season, late winter to spring for warm-season |
| Spider flower | Fall to winter for cool-season, late winter to spring for warm-season |
| Floss flower | Fall to winter for cool-season, late winter to spring for warm-season |
| Moss rose | Fall to winter for cool-season, late winter to spring for warm-season |
Zones measure winter cold, not season length, so your own frost dates can be a week or two off the zone median. Look up your frost dates by ZIP code, or read all about zone 10a.
Hardiness ranges, light and size are typical figures from university extension services and botanic garden plant records; a named variety can differ, so check its tag. Planting dates come from each zone's median frost dates (NOAA 1991 to 2020 climate normals) and the timing rules in how we check.