To success in gardening, it’s important to know YOUR garden’s USDA planting zone.
Every region has micro-climates, so they have different zones, for example:
Medford, Oregon is USDA Zone 8a, 10°F to 15°F
Ashland, Oregon is USDA Zone 7b, 5°F to 10°F
You can check your area with this interactive map, click on your city and the zone pops up.
Always check USDA Zone on plants at the nursery, before you buy.