To say when a Cattleya will bloom without knowing it's name is a tough guess. Different types bloom at different times of year. Most of my cattleya do like a dryer winter as the sun fades and days are shorter. But as long as your plant is in active growth you should continue to fertilize and water regularly. If it is growing well but not blooming I would try to find a way to give it more sunlight. Sunlight is usually the cause of no blooms.