Dendrobium
These Need a Warm Greenhouse for Their Successful Cultivation
A large and pop group of greenhouse Orchids see dotty throughout the East , in Ceylon , Burma , India , Australia , the Philippines , and in parts of China and Japan . Each sort has more or less adapted itself to its own special climatical conditions , with the upshot that the plants change greatly in growth . Some are small and bear very little flowers ; others have large pseudobulbs 4 or 5 foot . long . A few grow on rocks , but the bulk are epiphytal and have evergreen plant leaves . The name Dendrobium is educe fromdendron , a tree , andbios , life , pertain to the fact that a greater number grow on trees .
Dendrobiums are group in three sections : those which produce their flush from the nodes of the root word in 2 and threes , as in the democratic D. nobile ; those which develop their flowers in arching spikes from near the top of the cylindric pseudobulbs , as D. Phalaenopsis ; and others which produce large , handsome cone of flower from near the top of large , club - work pseudobulb , as in D. thyrsiflorum .
Summer and Winter Management
As dendrobium are so widely distributed , and motley so greatly , conditions of refinement must needfully be varied . They need warm , moist precondition during dynamic growth , but the wintertime temperature must be regulate according to their needs . With care , many of the Amerindic and Burmese sort can be overwinter in a temperature of 50 - 55 degrees . The night temperature for Australian , New Guinea and Malayan kinds should not fall below 60 degrees and 65 academic degree is preferred . Though their pseudobulb are much hard and apparently more immune than those of many of the Dendrobiums from the Near East , they must not be rested completely but must be water at infrequent intervals even when not make fresh emergence .
The Indian and Burmese kind necessitate an copiousness of heating plant , atmospherical wet and pee when in full growing ; they must be shade in summertime , but take vulnerability to Inner Light and air in fall to mature the growth . Those with hard pseudobulbs must have a definite sleep , those with softer bow , such as D. infundibulum , must be kept jolly moist at the root word throughout the winter , and others of intermediate character , like D. nobile , only involve casual watering at that time of year . The Australian kinds need much less shading through the summer , only sufficient to prevent the leaves from being scorched .
Suitable Potting Compost
Thecompostfor all form may dwell of finely reduce osmunda fiber or of Fir barque . When repot Dendrobiums as minor a wad or trash as potential must be used , for the water must go on rapidly away , and the compost must never become sodden . The smaller - farm industrial plant may be place in pans and suspend near the glass . Drooping variety are grow in hoop , or sometimes on blocking of Natalie Wood . Potting should be done in February or March , if potential , but only when the plant show signs of fresh growth ; it must never be done in the autumn .
Propagation
To increase the stock , large plants are divided at repotting time , or , in the case of D. nobile and its hybrids and a few other kinds , matured and good pseudobulbs may be cut into lengths of 2 or 3 in . Each of the bit must contain one or two nodes . They should be pressed securely on sand and lay in a propagating case with bottom heat in January . When new growths come along they may be take off when rooted and potted on an individual basis .
Many Dendrobiums form young growths from some part , ordinarily the upper portion , of the pseudobulb ; when root , these may be take away and pot . Such little plants should have the welfare of a propagate grammatical case , if available , for a time ; or a warm position in the Orchid nursery .
Over a hundred kinds , in addition to legion hybrid obtain chiefly from D. nobile , are know in cultivation , but the watch over are the most noteworthy .
The FavoriteDendrobium nobile , which has stemlike pseudobulb , is 1 - 2 ft . high , and raise its flowers in twos and terzetto , in February and March , from the nodes of the old year ’s pseudobulbs . The flowers are comparatively big , white , tip rose - purpleness . D. heterocarpum has shorter pseudobulb and chickenhearted , fragrant blossom , in March . D. chrysanthum has foresighted , slender pseudobulb with deep orange - yellow-bellied flowers comport on the new growths , in summertime and sometimes in autumn . D. crystallinum has erect pseudobulbs and white , magenta - tip flowers in May or June . Other kinds which bear flower from the knob on the stemlike pseudobulb are D. Aphrodite , D. Bensoniae , D. regium , D. Findlayanum and D. Wardianum .
dendrobium with cone-shaped inflorescences are D. thyrsiflorum in which the bulbs are sometimes 30 in . richly ; the blossom are most dramatic . They have white sepal and petals and a golden‑orange backtalk . D. densiflorum is similar in use of growth but has golden - icteric blossom , and D. Farmeri , which is smaller , has straw - white-livered , pinkish - tinted flowers . All flower in May , from the upper parting of old and new pseudobulbs . All the foregoing should be rested in wintertime , and need a minimum temperature of 50 - 55 degrees .
Flowers of Many Colors
Dendrobium Jamesianum and D. infundibulum have slender , vertical stems , and bear large , ashen , orange - throated flowers in April and May . They should be kept dampish throughout the year . Some botanists deal D. Jamesianum to be a smorgasbord of D. infundibulum .
D. fimbriatum has magniloquent , stemlike pseudobulbs and bears orangish - colored flowers in arching racemes ; the smorgasbord oculatum has a dark splodge on the mouth . Both prime in spring chiefly . D. Brymerianum has stanch 12 - 14 in . high , with golden - yellow prime , normally in May . D. clavatum and D. Gibsonii have grandiloquent root word and yellow-bellied flowers . For these form the temperature should not fall below 55 degrees in winter .
D. pulchellum ( Dalhousieanum ) has stout stems 4 - 5 foot . high and flowers 4 - 5 in . across , tawny - chicken , shaded with rose , and with two black - crimson blotch on the lip ; the plant flowers about May and must have a tropical atmosphere , with a winter temperature of not less than 60 degrees . D. Phalaenopsis , a handsome kind from New Guinea , has stout pseudobulbs , 2 - 3 ft . high , with five to twenty - flowered arching spikes . The large flowers of the typical kind are deep rose shade to purpleness , but great variation exists . Variety Schroederlanum is white . September and October yield the with child harvest of flowers , but they appear at all season . The winter temperature should be from 60 - 65 degrees at Nox . D. Victoriae - Reginae has clump flowers of purplish blue sky ; it needs a minimal wintertime temperature of 55 degree .
