Rozanne geraniums, also called Crane's Bills, won the 2008 Perennial Plant of the Year award for their wide, violet, saucer-shaped blooms. These heat-tolerant garden favorites bloom from late spring until the last frost of the season, providing a wealth of color for any garden. Rozanne geraniums are well-suited for indoor and outdoor planting and grow well in the ground or containers. Reaching 20 inches in height with a 36-inch spread, Rozanne geraniums thrive in partial shade or full sun and require rich, organic soil for best results.
Plant Rozanne geraniums in locations with well-draining soil. For container-grown geraniums, choose containers that provide drainage holes at the bottom.
Spread a 1- to 2-inch layer of mulch around the base of each plant. This helps retain constant moisture and prevents soil from getting onto plants during heavy rainfall.
Water garden and landscape geraniums with 1 inch of water at least once per week. Increase watering when drought conditions occur to prevent wilting. For container-grown plants, water several times per week to prevent wilt.
Apply water at the base of each flower to prevent excess moisture on the foliage. If you use overhead irrigation, water early in the day so that plants dry out before nightfall.