The genus has two hundred species of ferns, some rustic can be grown in the garden, others in greenhouses and in apartments. They are used as ornamental plants for light and decorative foliage.
The Adiantum venustum, also called Capelvenere, is a garden species that changes color over the course of the year: the fronds, when they grow old, turn from glaucous to brown and the new fronds are pink. It is about 15 cm high and has a diameter of about 20 cm; the fronds are triangular and thin, with the upper convex page, composed of numerous pinnules, and are carried by blackish petioles.
The Adiantum venustum should not be exposed to direct sunlight and prefers shaded areas, being a plant that develops in the undergrowth in nature. Fears the winter cold, so it should be sheltered at home, even if it does not particularly like the dry heat of heating, it is therefore appropriate to place it in a room of the house not too heated, remembering to increase the rate of atmospheric humidity by vaporizing, at least once a week , with distilled water. The ideal temperature for Capelvenere cultivation is around 18 ° C.
The waterings for the Adiantum venustum must be abundant and regular in the summer and, during the whole vegetative period, the soil must always be kept humid but not soaked, as the water stagnations are harmful.
With the arrival of the first colds it is better to thin out the waterings, and supply water once every 10-15 days, waiting for the soil to dry a little before watering again, but if the plant is kept in a heated place it is advisable to water it more often . On hot days, it is good to spray the leaves of the water at room temperature to allow the Adiantum venustum plant to enjoy the right level of humidity.
During the period from March to October it is advisable to add some fertilizer for green plants to the water of the watering, every two weeks approximately.
The plants of Adiantum venustum like a very fertile, well-drained and soft soil; for this reason it is advisable to use universal soil with the addition of peat and sand.
They are plants with rather rapid growth, so it is good to plan to repot them in the spring season.
The Capelvenere plant can be reproduced by spores but this system does not always give results. The simplest system is by division of the rhizomes in spring. The rhizomes are planted in pots with a mixture of soil, peat and sand in equal parts. The pots are kept in a protected place in the shade and in a humid atmosphere.
Capelvenere - Adiantum venustum: Pests and diseases
The little pigs feed on the roots. Root scale insects attack the root system; leaf miners cause large black patches to frond tissue.
These plants can also suffer from fungal diseases resulting from excessive soil moisture and can be attacked by scale insects; if their presence is limited, it is possible to intervene manually, eliminating them with the help of a cloth or a cotton pad with alcohol. Otherwise it is good to use a specific product.