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This genus includes about 30-40 species of semi-evergreen ferns originating in Asia, Africa, New Zealand and southern Europe; D. canariensis is native to the Canary Islands, as its botanical name suggests. It consists of dense clumps of long thin, narrow, finely divided leaves, light green in color, sometimes shiny; at the base of the leaves often thick and fleshy aerial roots develop, covered with a brown down; these plants have a fairly slow development and reach a height of about 40-50 cm; they prefer hanging containers or wide and low vases, from which they usually tend to spill over.
One of the most important factors to keep in mind when growing a plant is the exposure, ie the position in which to place our plant species. This is because each plant needs particular amounts of light or shade, rather dry or humid climate and if we do not know these specific crop needs in the best way, our plant may have difficulty developing.
The fern loves quite bright locations, but far from sunlight; especially in the hottest seasons it needs shading. Fears the cold, although it can withstand temperatures of 3-5 ° C for short periods; in summer it can be taken outside, sheltered from the sun and wind, in autumn it is taken indoors and placed in an average bright place.
The davallia need abundant and regular watering throughout the course of the year, the soil must be constantly kept humid, but not too wet to avoid root rot; it is advisable to raise the environmental humidity also by often vaporizing the fern with distilled water to allow it to grow in a habitat that is as natural as possible. Provide fertilizer for green plants every 15-20 days to encourage abundant leaf growth. The fertilizer should be administered with irrigation water.
The soil is the main source of sustenance for the plants as they perceive the nutrients they need to live. For this reason, it is important to choose the ideal type of soil to best grow our davallia. These ferns love an acidic, sandy, loose, rich and very well drained soil; use a mixture of sand, peat and universal soil, mixed with soil for epiphytic plants, consisting of shredded bark and sphagnum.
The multiplication of the fern must be done in spring. It is possible to divide the heads of leaves, maintaining vigorous roots in each portion practiced; the new plants thus obtained must be immediately placed in a single container, avoiding the use of oversized vessels. These ferns can also be reproduced by spores, but very rarely for container-grown plants.
Fern - Davallia: Pests and diseases
As for the parasites and diseases that davallia could develop, we must remember that these ferns fear root rot, aphids, cochineal and white fly. If attacked by pests, use insecticides sparingly for vampires on the leaves, since they could ruin them, prefer insecticides to add to the water used for watering.