Washingtonia filifera seeds - California fan palm

Sowing the seeds of Washingtonia filifera, also known as the Petticoat Palm or California Palm, allows you to grow one of the most impressive hardy palms at a low cost. It is distinguished from Washingtonia robusta, with which it hybridises readily, by a more massive trunk and better cold resistance, withstanding temperatures down to -12°C in mild climates and well-drained soil. Its rapid growth enables it to develop a broad, robust trunk, topped with a dense crown of large, fan-shaped palmate leaves, whose segments are edged with distinctive whitish filaments. Highly prized for its stately appearance, it tolerates sea spray and drought, making it a perfect choice for Mediterranean and coastal gardens.

Washingtonia filifera (synonyms Pritchardia filamentosa, Neowashingtonia filifera, Brahea filamentosa, Washingtonia filamentosa, Pritchardia filifera, Neowashingtonia filamentosa) belongs to the Arecaceae family. Also known as the California Fan Palm, it is native to the south-western United States and north-western Mexico, growing naturally in arid areas, often near underground water sources in canyons and damp gorges. In its natural habitat, it can reach 17 to 18 metres in height, while in cultivation, its size depends on growing conditions and may be more moderate. Its imposing trunk, which can reach 1.20m in diameter, displays a cracked brown hue and widens at the base. The foliage, arranged in a terminal crown, generally does not exceed 4.5 metres in spread. At its summit, around 30 long petioles (up to 1.75m in length) bear circular palmate leaves of 90cm in diameter, a brilliant glossy green. Each leaf is divided into around 60 narrow segments, the edges of which are adorned with silky white filaments, particularly visible on young plants. One of the distinctive features of this palm is the "petticoat" formed by the accumulation of dried, trailing petioles, which can remain attached to the trunk for a long time. The spectacular flowering occurs on specimens around 20 years old, exclusively outdoors and in summer. It appears in the form of long, arching inflorescences, which can measure up to 4 metres, extending well beyond the crown of leaves. The numerous cream to beige flowers are followed by a profusion of small, shiny black fruits, each containing a single smooth, dark brown to black seed.

Washingtonia filifera is a highly prized ornamental palm in regions with mild climates, particularly by the coast where it tolerates wind and sea spray well. Along with Washingtonia robusta and Phoenix canariensis, it is among the most widely grown palms, from tropical zones to temperate regions. It also adapts to growing in a large container, allowing it to be overwintered in a bright, cool, and airy location if necessary. Its slender, elegant habit makes it an ideal choice as a specimen plant, particularly near an entrance, gateway, or swimming pool, where it brings a touch of the exotic. It blends harmoniously into Mediterranean borders, alongside Eucalyptus, large Mimosa or other typical coastal climate plants. Undemanding, it thrives in well-drained soil and prefers a sunny position.