New, distinct and stable cultivars of double-flowering Kalanchoe interspecific hybrids are disclosed. Double-flowering Kalanchoe interspecific hybrids produce one or more flowers with at least 5 full or partial petals per flower. Double-type K. aromatica.times.K. blossfeldiana, K. grandiflora.times.K. blossfeldiana, K. laciniata.times.K. blossfeldiana, K. pumila.times.K. blossfeldiana, K. marmorata.times.K. blossfeldiana, K. porphyrocalux.times.K. blossfeldiana, K. jongmansii.times.K. blossfeldiana, K. pinnata.times.K. blossfeldiana and K. daigremontiana.times.K. blossfeldiana are disclosed. The double-type flowering characteristic has been combined with many desirable Kalanchoe traits including different flower colors, growth characteristics and plant habit. Methods for the reliable breeding of the double-type characteristic into diverse Kalanchoe genetic backgrounds, as well as methods for increasing the number of petals per flower, are disclosed.