Although it is named for Rancho Santa Margarita y Las Flores, which was in San Diego County, the city limits fall within the borders of Rancho Mission Viejo. At 20 characters long, it is the longest city name in California. Conroy's Flowers delivers to Rancho Santa Margarita. The next time you need flower delivery, think of Conroy's Flowers. We have something to suit everyone's floral needs.