Habranthus robustus - Argentine rain lily

Habranthus robustus is a relatively unknown, tender South American bulb that rare plant enthusiasts will love for its beautiful pink summer flowering, resembling a small amaryllis borne on a short stem. The robust habranthus perishes below -5°C so should be grown in pots outside of sheltered coastal gardens, as it requires fairly humid summers. The pot can be stored indoors during winter in a greenhouse, a conservatory, or a winter garden to protect it from frost. It will spend the summer on the balcony or terrace.

Habranthus robustus belongs to the Amaryllidaceae family. This botanical species is native to the south of Brazil and Argentina, and it is also found in Mexico and the southern United States in the warmest areas, but well-watered in summer. It is a herbaceous plant with a perennial bulb. The foliage consists of a clump of fine ribbon-like, dark green leaves, approximately 20 cm (8in) long. Although usually deciduous, it will persist in part during winter if the plant is grown indoors. Flowering occurs from July to September depending on the climate, and lasts about 2 months. It takes the form of flower stems measuring 20 to 30 cm (8 to 12in) high, each bearing a solitary flower at its tip. Initially resembling a large soft pink crocus, this flower opens widely into a funnel shape, 6 cm (2in) in diameter, revealing a throat of a deeper pink and a centre of yellow stamens.

When planted in groups, Habranthus robustus creates a charming effect throughout summer. In favourable climates, you can plant it along the edge of a flowerbed or pathway amidst low-growing perennial plants such as compact perennial geraniums and small carnations, for example. This bulb will also thrive in a sunny rockery that remains moist in summer. Add a touch of exoticism to your balcony or terrace by creating beautiful pots that you can bring indoors for protection in winter, either in a conservatory or in a bright but poorly heated room.