Keith Umbreit is no stranger to gardening. Back when he was living in Riverside, he was a devoted rose grower and member of the local rosarian society.

“I had 69 rosebushes in my yard,” he recalled. “Every kind of tea roses, and vining roses, and hybrid roses. I had them all.”

But when Umbreit bought his current home in an Oceanside suburb in 2013, he gave up roses.