Plant Hardiness Zones 2024. Usda’s plant hardiness zone map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location. Evening primrose grows in full sun and is hardy to usda hardiness zones 4 to 9, which covers much of the country.
The plant hardiness zone map was updated for the 2024 gardening season with the addition of thousands more local weather stations. Department of agriculture has an updated plant hardiness zone map.