Repot after flowering and before July. When repotting remove the old dead roots and potting medium or divide them into clumps with three or more green bulbs. Remove dormant bulbs and set aside. Spread the white healthy roots into the new container and fill with the orchid medium, tamping it down firmly enough to hold the plant erect. Repeat the application at two week intervals for up to six months.
Dendrobiums like to be somewhat crowded in the pot.
Keep moist at all times. They prefer to be somewhat crowded in the pot. Leaves should be light green in color. Oncidiums will tolerate a wide range of temps. Maintain a daytime temperature of 75-85F and a night temperature not lower than 55.