The way I interpret your tag, the Calanthe is Calanthe Rozel, a seedling the result of crossing 2 different clones of Calanthe Rozel. I have had a Calanthe or two for many years. Rozel is a deciduous hybrid. It should flower in the middle of its dry dormant rest. Its parents are all warm growing low elevation species. Temps as for a Phalaenopsis.
So, when there are no leaves do not water at all. When the new growth is up at least 1/2 inch, then start watering. While in active growth, they want LOTS of water, and bright, Cattleya bright light. I accidentally set one, in spring in a Phrag tray of water, it grew so well standing in shallow water that I have repeated this several years in a row. You don't have to set them in water, it was a surprise as to how well it worked. Cool and wet is not good, warm and wet is good. They really want water and sun when growing. When leaves start to yellow, quit watering. Dry them out completely. Usually mine are dormant from Christmas until late March or early April. If you want to break dormancy early store them in a warm and sunny spot. They won't wake up if too cool. If grown wam, and stored dormant in warm temps, dormancy can be less than one month. For me, usually 3 months. Other than that, they are easy.
The flower bud will appear during the dry rest dormancy. I don't water while the flower stem is developing, only a single watering or two when the buds separate from the stem. Otherwise I keep them dry until new growth starts. Flowers don't last very long, maybe 1 to 2 weeks, but they open sequentially, and can be in bloom a long time. They are pretty.
