Roseville, California is in USDA Hardiness Zones 9b.Click to see full answer. Besides, what climate zone is Roseville CA? Additional Gardening Related Data for Zipcode 95747 – Roseville, California 1990 Hardiness Zone: Zone 9b: 25F to 30F Average First Frost: December 1 – 10 Average Last Frost: March 1 – 10 Koppen-Geiger Climate Zone: Csa – Hot-Summer Mediterranean Climate Ecoregion: Also Know, what planting zone is Northern California? A northern half of a California planting zone can be anywhere from 5a to 10b. The southern region has zones 5a to 11a. Planting zones help determine when and what to plant throughout the year. In this way, what zone is Sacramento CA for planting? 9b What is my growing zone?If you see a hardiness zone in a gardening catalog or plant description, chances are it refers to this USDA map. To find your USDA Hardiness Zone, enter your zip code or use the map below. Click here for more information about hardiness maps. Find your zone using the map below or enter your zip code.