Beth, this is one of my favorite species and I'm gradually getting decent/better at growing it. I find it easiest mounted because of the vining/branching growth habit, but I had a nice one going in a pot for several years without much trouble.
As with most of the species in section Dendrobium (aka 'nobile-type'), loddigesii responds well to a pronounced seasonality roughly mimicking the monsoonal climate of native areas. In the summer I grow mine warm, almost constantly moist, and somewhat shady (bright 'Phal light' seems like a good level). They also appreciate regular fertilizer while actively growing, I'm currently using Ray's K-Lite at about 100 PPM N once a week for all my plants.
For the cooler months I stop fertilizing around Nov or Dec, reduce water to once or twice a week, and try to give more light plus cooler temps, which is often the default in my windows anyway. I don't find it beneficial to keep plants bone-dry as is sometimes recommended, if watered moderately most clones will retain some leaves and seem to start up and bloom sooner come springtime. I generally guide watering by temps and leaf-drop, plants kept warmer (60+ F or so) get more, while those consistently kept under 60 F get less. A brief cold/dry spell will often cause a plant to drop all its leaves regardless of how else it's being kept, and once the leaves are gone the plants need much less (but still some) water, probably because their rate of transpiration drops substantially.
Leafless individuals should be watered more carefully when new growths appear in the spring, as they seem readier to rot than new growths on leafy plants. Good air movement and warmth also help plants get going quicker in springtime.
Sorry this is so long-winded, and good luck!
Let me know if you have any questions.
dendrobium loddigesii fun to grow?
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