Although I have only ever grown them in pots or hanging baskets I am sure you could plant KALANCHOE as as border plant as well (see below).
My first kalanchoe was given me by my next door neighbour and it survives still. I have bought several over the years and love the beautiful flowers of so many different hues.
Kalanchoe is a genus of about 125 species of tropical, succulent flowering plants in the family Crassulaceae, mainly native to the Old World. Only one species of this genus originates from the Americas. 56 from southern and eastern Asia and 60 species in Madagascar.
Most are shrubs or perennial herbacious plants, but a few are annual or biennial. The largest Kalanchoe beharensis from Madasgascar, can reach 6 metres (20ft) tall, but most species are leas than 1 metre (3ft) tall.
These plants are cultivated as ornamental houseplants and rock or succulent garden plants. They are popular because of their ease of propagation, low water requirements. and the wide variety of flower colours typically borne in clusters well above the foliage.