Kalanchoe thyrsiflora - Paddle plant

Kalanchoe thyrsiflora, also known as Thyrsus Kalanchoe, is a perennial succulent native to southern Africa. This plant is prized for its decorative foliage: large, rounded, fleshy leaves arranged in a rosette. The leaves are a greyish-green with reddish edges, covered in a white bloom, giving them a lovely powdery appearance. Indoors, this compact variety easily finds its place in a sunny room.

Belonging to the Crassulaceae family, Kalanchoe thyrsiflora or Kalanchoe alternans is a succulent plant native to the arid regions of southern Africa, primarily Botswana, Lesotho, and South Africa, where it grows on rocky soils exposed to full sun. In its natural habitat, this plant is adapted to dry conditions; it stores water in its thick, waxy leaves to survive long periods of drought. It forms a basal rosette habit, with broad, rounded, petiolate leaves that can grow up to 15 cm long and 10 cm wide. Their colour is typically greyish-green, with reddish edges that become more vibrant under strong light exposure. A fine white bloom covers the leaf surface, serving as protection against excessive evaporation. Kalanchoe thyrsiflora is a semelparous plant, meaning the main rosette dies after flowering. Upon reaching maturity, usually after 3 to 4 years, it produces an upright flower spike that can grow up to 1 metre tall. This inflorescence consists of greenish-yellow, urn-shaped flowers clustered in dense thyrses. These slightly fragrant flowers bloom from February to April, occasionally attracting pollinators outdoors. After flowering, the plant often produces basal shoots, which take over and ensure its longevity. Indoors, flowering is rare. It will be induced by maximum light exposure and slight water stress.

To grow Kalanchoe thyrsiflora indoors, it is essential to provide very bright exposure, ideally with a few hours of direct sunlight to encourage the reddish leaf colouring. A well-draining substrate will prevent excess moisture and root rot; a cactus mix is recommended. Watering moderately, allowing the substrate to dry out between waterings. During active growth, watering every two weeks is usually sufficient, while in winter, it is advisable to reduce watering frequency. The ideal ambient temperature is between 18 and 24°C, and the plant tolerates low humidity.

Kalanchoe thyrsiflora can be paired with a few Agave attenuata plants for the contrast between its rounded leaves and the agave’s elongated rosettes. It also pairs well with Crassula ovata and Gasteria to vary shapes and textures. In a pot arrangement, it can be accompanied by Pachyphytum oviferum, whose fleshy, powdery leaves harmonise beautifully.