Care of Dendrobium Orchids

By Robert Roy

Dendrobiums

This month I am focusing our attention to the care of Dendrobiums. These are one of the most popular of retail orchid plants. They are a true epiphyte or air plant. There pseudopods can gather and hold water very efficiently. Generally there will be a hybrid phalaenopsis and dendrobium, commonly known as Dtps.


Potting

This needs only to be done every two to three years and it should be with a porous, free draining media. This may be a combination of wood chips, small stone and and pieces of styrofoam peanuts. This will allow the draining of water and fertilizer. Dendrobiums seem to grow best when the pot is smaller than the size of the orchid plant.

Lighting

The dendrobium orchids require about 50% sun or bright light. They will do well in an east or west window as well as a shaded south window.

They also do well under 4 - 40 watt fluorescent lights directly over the plant.

Temperature

These plants need a difference in temperature between the night and day. Preferably this difference should be about 10 - 15 degrees. The night temps they like is 60-65 with days between 80 - 90.

Air circulation is needed and is especially when the temps are above 90 degrees.

Water

Like most orchids Dendrobiums need to be kept moist while actively growing. When it is mature, as are most of orchids-plus-more.com plants they should dry between watering.

Dendrobiums thrive when the humidity is about 50 - 60%. Humidity trays are usually needed while the plant is in the home.

Fertilizer

Use a balance fertilizer like Jack's Classic 20-20-20. Use weakly, weekly. That is, use a solution which is between 1/4 to 1/2 the recommended dosage.