Asplenium nidus 'Crispy Wave' - Bird's nest fern, hart's tongue

Asplenium nidus 'Crispy Wave' or hart's tongue 'Crispy Wave' is an elegant houseplant, suited to bright and slightly humid rooms. Its bright green, very crinkled foliage forms a dense rosette reminiscent of a small nest perched atop the pot. This architectural fern finds a place in the living room, bathroom, or kitchen, either as a standalone potted plant or integrated into a group of tropical plants.

Botanically, Asplenium 'Crispy Wave' belongs to the Aspleniaceae family and descends from the species Asplenium nidus, the famous hart's tongue. The wild species originates from the humid tropical forests of Africa, Southeast Asia, and Oceania, where it grows as an epiphyte, settled on trunks and branches.
The cultivar 'Crispy Wave' was selected in Japan from the cultivar 'Osaka': a mutation spotted in the 1960s on Yakushima Island, later stabilised and disseminated in the early 2000s by the Shinryuen house. This fern forms a compact clump of evergreen fronds, erect in a rosette. The lanceolate leaves measure up to 20 cm long by 3 to 4 cm wide. Their texture is leathery, very rigid, and they are a bright yellow-green. The lraf blade has a strongly wavy, almost pleated margin. The coiled fronds emerge brown and hairy, then unfurl into regular ribbons traversed by a prominent midrib, underlined with brown on the reverse. At maturity, lines of brown sori appear on the back of the fronds; these are the reproductive organs of this fern. Its growth is slow, around one centimetre per month, and the mature plant rarely exceeds 30 to 40 cm in height by 25 to 50 cm in width in a pot.

In cultivation, it appreciates medium to fairly bright indirect light, at a good distance from south-facing windows, and doesn't like direct sun, which burns its fronds. A rich in organic matter, slightly acidic, and always somewhat moist substrate suits it. The ideal is to maintain a high humidity, around 50 to 70%, as well as a stable temperature fluctuating between 18 and 24 °C, without dropping consistently below 12 °C.
It will easily find these conditions in a bright bathroom or kitchen.

Asplenium nidus 'Crispy Wave' will decorate an east-facing windowsill, a console in the hallway, or a bathroom shelf. Its undulate rosette of a luminous green adds volume and a tropical woodland feel. Choose a white ceramic cachepot, for example. This fern pairs well with other plants that love humidity and soft light, such as a Calathea 'Medallion', a Fittonia 'Joly Josan Red' with coloured veins, or a Boston fern (Nephrolepis exaltata). These plants allow you to create a corner of lush greenery on a low piece of furniture, at the foot of a window with a sheer curtain, or grouped on a decorative tray.