Yes indeed it is possible, just make sure that the temperature does not fall below 30 oC day and 26-27 oC at night. They should also get long days (14-16 h) day and 10 to 8 hour nights. Fertilize with a high nitrogen fertilizer like 30:10:10 and finally after doing this if so spikes do show, nip them in the bud. This will ensure the vegetative phase. The shortening days and the day-night temperature variations are what triggers flower production in most orchids.