Oso Easy Lemon Zest Rose. Spring Meadow Nurseries says: "We evaluated yellow roses for year to find one that lived up to our demands for brilliant color and excellent disease resistance. This is it! Sunny, canary yellow flowers do not fade to white. It is free-flowering, self-cleaning, and highly disease resistant. The American rose Society thinks so, too; it earned an ARS Award of Excellence in the No spray category in 2016."