When fed well, given strong light and ample watering, Den. anosmum can produce impressively large leaves.
Light: These plants love high light and benefit from some hours of full sun, some can even stand full midday sun without complaint, however exposing the base of the canes to full sun is deathly for these plants. The base of the canes will die if sunburned, and eventually the plant will die too. It is a perplexing and surprising experience when your plant suddenly becomes a group of live canes held together by a dead base.
Watering: Everyday at the height of the growing season, drenching the pots until water flows out. When leaves start turning yellow I stop watering, (around December), when flower buds appear, in the middle of February locally I resume watering.
Fertilizing: Heavy, on plants potted upside down I put some pieces of horse manure on top of the pot.
Potting: I no longer pot my pendent dendrobiums in the top of pots, I pot them in the bottom of wire baskets and pots I make out of soda pop bottles. I started potting them upside down because I became extremely frustrated with the fact that plants eventually weighted so much they would tip the pots and make watering and fertilizing difficult. Plants can stay in these pots for many years. The first plant I potted in a soda pop bottle fifteen years ago is still growing in the same pot.
Media: These plants seem to be able to grow on anything as long as it allows for oxygenation of the roots. Every year I hose off the decayed material and add fresh one. I have used sphagnum moss, bark of all sizes, glass marbles, wood chips, tree fern, charcoal, etc. As long as the plant gets watered and fertilized appropriately for the material it seems to make no difference.Since a picture is worth a thousand words here are some showing how I pot my plants.