Dendrobium orchids are evergreen flowering plants that, in nature, grow on trees. The dendrobium will bloom from six to eight weeks, on long, sturdy stalks and make striking cut flower arrangements. Since pruning at the wrong time may result in the elimination of dendrobium flower buds it is best to prune when the flowers have died and the stalk turns yellow or brown.
Cut the flower stalk to within 1 inch of where it grew from the plant.
Remove dead or diseased leaves or branches.
Remove the dendrobium from its pot and gently cut away any dead roots. Repot, back into the original pot, with fresh fir bark or other orchid-growing medium.
Water the plant until the water drains from the bottom of the pot.