Regions

USDA Hardiness Zones
7 to 9

AHS Heat Zones
2 to 8

The Region
Mild, rainy winters are a signature of this region, which stretches from Seattle to San Francisco, and from the Pacific Ocean to the Cascade and Sierra ranges. Fall through spring, the northernmost parts may see more rain than sun. The experts advise a two-prong approach: select the many disease-resistant roses now available; and drench the soil and spray the canes and emerging buds in early spring with a generous dose of compost tea. Gardeners will be rewarded with a first flush of blooms in late spring, followed by waves of perfect buds and flowers all summer, and a final round of flowering in October and November.