Ranunculus, also called Persian buttercup, grows 12 to 18 inches tall. The flowers have layered petals and come in a wide range of colors. This plant is a perennial in USDA zones 8 to 10, which means it can overwinter in regions where the temperature does not drop below 20 degrees Fahrenheit. In other regions, you may grow the plant, but it requires special care during the winter months.
Plant ranunculus bedding plants or tubers in an area with full sun and well-drained soil. Soak tubers for 24 hours before planting, and plant them 2 to 3 inches into the ground, with the spiked end facing down, about 6 inches apart from one another. Plant bedding plants so that the top of the root ball is level with the soil.
Water bedding plants, keeping them moist, to help establish them in the ground. If you plant tubers, do not water until the plants sprout. Allow established plants to dry slightly between waterings.
Fertilize the ranunuculus sparingly with a complete, liquid fertilizer once it starts actively growing. These flowers do not need fertilizer to grow well, but an application of fertilizer diluted by half about once a month will help.
Deadhead the flowers as they begin to fade. This will direct the energy of the plant to bloom production instead of seed production.
Stop watering and allow the foliage to die back when blooming slows and the foliage yellows. This will occur in summer.