56-70 days. Mission Bells California poppy seeds grow a classic, durable, and authentic touch of the cool California hills in your home or garden. Mission Bells California poppy is easy to grow from seed and a hardy full sun performer, yet still elegant enough for any fresh cut basket or bouquet. Mission Bells seeds promise neat 12" tall California poppies bursting with gorgeous 2-3" blooms in a seasonal mix of peach, rose, canary, magenta, white, and bronze. Mission Bells California poppies grow native in the temperate coastal climates of the Pacific Northwest, but promise to thrive in a number of cool summer gardens across the country.