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Light:  
  • Dendrobiums love morning and afternoon sun. However, they should be shaded from intense afternoon heat.     
  • Dendrobiums do best in an east or shaded west facing window.
  • If
    the foliage on the plant is dark green, it is an indication the plant
    needs more light. Yellowish leaves indicate the plant is getting to much
    light. Ideally, the foliage should be a bright olive green.
Temperature:
  • Ideally, dendrobiums need variations of between 15 and 20°F between daytime and
    night time temperatures. The night time temperatures should be between
    60-65°F and 70-90°F during the day. If the temperatures do get little
    high, one should increase the humidity, water and air circulation around
    the plant to compensate.  
  • If dendrobiums are exposed to temperatures below 50°F, there may be some leaf drop.  
Water:  
  • Dendrobiums have water storage bulbs and need to dry out between waterings.
  • The
    best way to water dendrobiums is to remove them from their decorative
    pots and flush them with water for 1 to 2 minutes under a faucet. If
    that is not possible, you can also place 5 or so ice cubes on the bark
    once a week. 
Humidity:  
  • Dendrobiums
    need humidity conditions between 50% and 60% humidity. In warmer and
    drier conditions, dendrobiums can be placed on gravel that has water in
    the bottom to elevate the local humidity. However, you should never let
    the pots sit in water as this will cause root rot. 
  • On days of high humidity make sure there is good air circulation around the plants. 
Feeding:  
  • In general, dendrobiums do best and are at their healthiest when fertilized on a regular basis. Once a month is ideal. 
  • The
    growers recommend that you use a well balanced formulation such as
    30-10-10 or a ratio that is similar. However, it is important that the
    plants are slightly moist before fertilizing to avoid burning.