Dendrobium orchid is one of the easiest orchid varieties to grow. It makes for a beautiful flowering houseplant to decorate a desk, tabletop, or window sill. Most varieties have a tall, upright shape, making them a fun contrast for the more common moth orchid. Dendrobium orchids add a stylish note to any space. Water orchids when the moss or bark starts to dry out. Some types can store water in their stems, making them drought tolerant.