Dendrobium
(DEN-dro-bee-um)
Dendrobiums are an
excellent choice for the novice grower. Flowers are available in a wide range
of colors, sizes and shapes. From the time that the first flower bud opens, the
sprays will remain in bloom for the next 2 months. If the plant is kept in a
bright warm spot, the plant may produce subsequent sprays of flowers. Please
follow the guidelines provided for successful cultivation.
LIGHTING
Sufficient lighting is must for successful cultivation. Dendrobiums prefer
either an east or a lightly shaded south facing window. Dark green leaves are
an indication of insufficient lighting.
TEMPERATURE
Provide nighttime temperatures of 55 to 60°F and daytime temperatures of 70 to
90°F.
WATERING
Depending upon the temperature, Dendrobiums should be watered about once or
twice a week. During the summer, the plants may need to be watered every 4-5
days. The rule of thumb for watering should be as followed : More heat more
water, less heat less water.
Dendrobiums must be allowed
to dry out completely in between watering. Try to water the plants early in the
day, so that the foliage will be dry by nightfall. To prevent bacterial and
fungal disease use Physan 20 once a month.
HUMIDITY
Dendrobiums prefer 40% to 50% humidity. Humidity Trays may be needed,
especially if a heater or air conditioner is in use in the house.
FERTILIZER
Dendrobiums must be fertilized on a regular basis! For best results, use
Norman's Optimal Orchid Nutrients every other week. It is recommended to
pre-water plants, before applying the diluted nutrient solution if the potting
media is dry.
POTTING
Dendrobiums should be grown in Medium Orchid Bark Mix and should be repotted
once every two years. Ideally, Dendrobiums should be repotted in the spring.
Dendrobiums do best when grown in pots that are small for the size of the
plant.
PESTS
Common pest associated with Dendrobiums are scale, mealy bugs and spider mites.
X-CLUDE, encapsulated pyrethrum time-release insecticide, and Neem Oil are the
most efficient methods of pest control.