DENDROBIUM LISTING 
#113 
Dendrobiums are a large and varied genus of plants with spectacular flowers of 
varying hues and lovely color combinations. ‘The species are found throughout the 
East from Ceylon through India, Burma, Assam, Maylasia, parts of China and Japan 
to the Philippines and Australia. 
The majority are easily grown and are free=-flowering with excellent keeping quality, 
especially when a change of season occurs or when climatic conditions allow for 
temperature variations during their ripening or resting periods. 
Dendrobiums are divided into two cultural groups = the Nobile and Phalaenopsis sections. 
CULTURE: The general requirements of Dendrobiums are periods of growth and reste When 
growing, a cattleya temperature with plenty of humidity, moderate quantities of water, 
overhead syringing and light are required. As the new season's growths are completed, 
start ripening them off by cutting down on pot wateringy continuing the overhead 
syringing until the flower buds appear, at which time increase the watering againe 
During this ripening period it is beneficial to move the plants cooler and lighter if 
possible. This ripening is of prime importance for best flowering results, but should 
not be so severe as to shrivel the bulbs. 
The Dendrobium Phalaenopsis section will do best in cattleya temperature with the 
resting period shortere 
All of the Nobile section will do well hanging and this is especially true through 
the resting or checking periods. 
PROPAGATION: Dendrobiums are raised from seed and plant stock can also be increased 
by dividing the plants at the rhizomes. They sometimes have a tendency to grow off- 
shoots from the pseudobulbs which, when rooted, may be cut off and potted. Old 
pseudobulbs can sometimes be cut into sections between the nodes, leaving two nodes 
to each section and laid horizontally on sphagnum moss or'’Vermiculite, covered over, 
placed in a warm, moist atmosphere and little plantlets will start at the nodese 
POTTING: Pot in a good, medium grade of Osmunda fibre as small as possible, allowing 
for a two year growth period. For best results pot the Nobile section soon after 
flowering. The Phalaenopsis section should be repotted when the new growth reaches 
a height of two to three inches. 
FEEDING: Dendrobiums respond beautifully to feeding and we recommend Wilson's 
Orchid Fertilizer, a 10-10-10 developed by Dre Oc We Davidson of the New Jersey 
Experiment Station at Rutgers University. 
GRAVEL CULTURE: All of the Dendrobiums do very well potted in gravel and again we 
recommend the above Orchid Fertilizer used as directed for gravel culturee In gravel 
potting use larger sizes of pots and a at granite gravele 
We grow our Dendrobiums of the Nobile section in a Cymbidium house with a high light 
intensity of about 75% total light. We use a light weave green 13 x 1) Lumite Horti- 
cultural Shade Cloth of a 2015 mil. filament with a light transmission factor of 
close to 75% on the outside of the clear glass, with no other shading from March 
through Octobere ‘This, together with a feeding program as well as under=the=bench 
humidity system of our special H=-261 nozzle tips, plus adequate top and bottom 
ventillation, results in exceptionally fine growth and flowering with some large 
plants producing over 100 flowers measuring up to 4 inches acrosse At the show of 
buds we move some into a warmer house and flower them for Christmas, New Years and 
Januarye The balance left in the cool house flower in February and Marche In 
addition to the following listing of flowering size plants, we have smaller plants in 
established divisions or offshoots, a year or two from flowering, which are also listede 
Every collection should have some plants of the beautiful and showy Dendrobium. 
This listing cancels all previous Dendrobium offerings. 
