Washingtonia robusta seeds - Mexican Fan Palm

Washingtonia robusta, also known as the Mexican Fan Palm or Petticoat Palm, is a slender and majestic palm, characterised by its rapid growth and slender habit. Its thin, tall trunk is topped with a dense crown of large, fan-shaped palmate leaves, almost round in outline. One of its distinctive features is its natural "petticoat", formed by the old, dry, trailing leaves that wrap around the upper part of the trunk. Not very hardy (down to -8°C), it is suited to mild climates, where it withstands summer drought and sea spray well. Sowing is a simple and effective method to grow it at low cost, in warm, humid conditions and with a little patience.

Washingtonia robusta belongs to the Arecaceae family, just like its close relative Washingtonia filifera, to which it is often compared. However, it is distinguished by a thinner, taller trunk and even faster growth. Native to the desert regions of Sonora and Baja California in Mexico, it grows naturally in arid areas, where it draws water from deep within canyons and oases. This palm can reach up to 25 metres in height, with a thin trunk about 80cm in diameter, slightly swollen at the base. Its foliage, arranged in a terminal crown, does not exceed 3 metres across, giving it a graceful, slender silhouette. The long petioles (1.50m) are reddish at the base, armed with sharp, orange-brown teeth. Each petiole bears a circular leaf, 80cm in diameter, of intense glossy green, divided into fine, flexible segments. On mature specimens, a pale patch visible beneath the foliage marks the junction between the petioles and the segments. Its "petticoat" of dead leaves, characteristic of Washingtonia, persists for a long time and forms a natural protection against the elements. The spectacular summer flowering occurs only on specimens grown outdoors and several years old. It appears as long, arching inflorescences that can reach 4 metres, extending well beyond the crown. The numerous cream to flesh-coloured flowers give way to small, shiny black fruits, each containing a single smooth, dark seed, capable of germinating quickly.

Washingtonia robusta is a highly prized ornamental palm for mild climates, particularly by the seaside, where it tolerates sea spray and drought. Along with Washingtonia filifera and Phoenix canariensis, it is among the most widely cultivated palms, from tropical regions to temperate zones. In cooler climates, it can be grown in a large container to be overwintered in a bright, cool, and airy location indoors. Its slender, majestic silhouette makes it an ideal choice as a specimen plant, particularly near an entrance, gateway, or swimming pool, where it brings an exotic ambience. It integrates perfectly into Mediterranean gardens, accompanied by Eucalyptus, large Mimosa, or other plants suited to coastal climates. It thrives in well-drained soil, in a sunny position, and requires regular watering in summer to optimise its rapid growth.