Those grown in pots prefer containers that are small relative to the plant size. They like to be pot-bound and don't readily take to frequent repotting. According to Growing Orchids , a cultural handbook by the American Orchid Society, a suitable pot would be one just big enough to hold three or four years of clustered growth. Hang the container to prevent top growth from toppling the small pot. When actively growing, large dendrobiums like biweekly applications of a liquid balanced fertilizer.
Small ones get by on monthly applications.
Do not fertilize when the plants are dormant. I suggest you visit a nursery that specializes in orchids and pick up more information on growing dendrobiums. May. This vine requires little except a humus-enriched soil. Confederate jasmine needs average water and sun to bright shade. A little sun will boost blooms.