Dendrobium williamsonii is native to southern China (Guangxi, Hainan, Yunnan), Assam, and Indochina (Thailand, Myanmar, Vietnam). It grows epiphytic on tree trunks in forests at elevations around 600 to 1400 meters above sea level.
Dendrobium williamsonii also called as Williamson's Dendrobium, Callista lubbersiana, Callista williamsonii, Dendrobium lubbersianum, is a species of the genus Dendrobium. This species was described by John Day & Heinrich Gustav Reichenbach in 1869.
IDENTIFY DENDROBIUM WILLIAMSONII ORCHID PLANT
Dendrobium williamsonii is native to southern China (Guangxi, Hainan, Yunnan), Assam, and Indochina (Thailand, Myanmar, Vietnam). It grows epiphytic on tree trunks in forests at elevations around 600 to 1400 meters above sea level.
It is a small sized, warm to cool growing epiphyte with upright, elongate-fusiform, velvety, 10 inches long stems that are many leafed towards the apex carrying, oblong or lanceolate, velvety, obscurely bilobed apically, 7-9.5 x 1-2 cm leaves with leaf sheaths that are densely covered with black hairs.
Williamson's Dendrobium blooms in the late winter and early spring on a very short, black hairy, 1 to 3 flowered inflorescence carrying waxy, fragrant flowers that arise from near the apex of the newest maturing cane. The flowers have sepals and petals of creamy white on the inside and pale ochre yellow on the underside; the labellum having a large three-lobed blotch of golden red (sometimes cinnamon red) on the disk.
DENDROBIUM WILLIAMSONII ORCHID PLANT CARE AND CULTURE
Cultural information should only be used as a guide, and should be to be adapted to suit you. Your physical location; where you grow your plants, how much time you have to devote to their care, and many other factors, will need to be taken into account. Only then can you decide on the cultural methods that best suit you and your plants.
Light:
Dendrobium williamsonii like plenty of light (25000-50000 lux, better in bright, diffused light) but not direct sun's rays, except in the early morning. The light level should be as high as possible, which the plant can tolerate without scalding the leaves.
Temperature:
The average temperature of the summer day is 30-32 ° C, night 22 ° C, giving a daily difference of 8-9 ° C. In winter the average day temperature is 28-31 ° C, night 11-13 ° C, giving a daily difference of 15-18 ° C.
Humidity:
For most of the year, Williamson's Dendrobium need the humidity of almost 80%, but at the end of winter and at the beginning of spring it drops to around 60%. Too dry air has a negative effect on the development of the plant: its growth is inhibited, and the leaves begin to turn yellow and dry out. The higher temperature, the higher the humidity should be, and the higher the humidity, the more often and longer it is necessary to ventilate the room where the plants are contained, otherwise the probability of rotting and various kinds of fungal diseases.
Substrate, growing media and repotting:
Dendrobium williamsonii grows best in pots with staghorn peat as substrate (crocks and charcoal at the bottom of the pot). After potting, keep the plant in a cool, shady place for a few days before placing it in its growing position. Do not overpot. Use the smallest pot that will accommodate your plant.
It does not need frequent repot, therefore, it is desirable to transplant only when it is really necessary, for example, in cases of strong salinization or compaction of the substrate, at its critically high or low pH (the norm is from 5.5 to 6.5) or when the plant grows very strongly and the pot becomes cramped to it (pseudobulbs begin to hang from the edges of the pot). Repotting is best done immediately after flowering when new roots and new growth begin to grow.
Watering:
Williamson's Dendrobium will need heavy watering from the commencement of Summer until the first chill spell of Autumn, when watering should practically cease until the new shoots appear in Spring.
Watering is directly dependent on the temperature of the content, the higher it is, the more often it needs to be watered. When watering, excess water should flow freely from the pot, since stagnation of water both inside the pot and in its pan can very quickly lead to rotting of the roots and the lower part of the plant.
Fertilizer:
It is recommended to use a 1/4-1/2 dose of orchid fertilizer weekly. You can use the balanced fertilizer throughout the year or from spring to mid-summer use high-nitrogen fertilizer, and then until the end of autumn high-phosphoric fertilizer to stimulate flowering.
Rest period:
Dendrobium williamsonii need less water in the winter, especially if they grow under the conditions of a dark, short day that occurs at moderate latitudes. They should dry somewhat between waterings, but they should not be dry for a longer period. Frequent morning fogging and rare, economical watering should allow the plant to go through a dry period of rest, while providing it with sufficient humidity. Fertilization should be reduced or eliminated until new growths appear and a more abundant spring watering begins.
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