If you follow the following tips, you can maintain its blooming vigor. Do not keep it in direct sunlight. Instead keep it in places where they get indirect bright light. Keep it in a place where there is enough air circulation and sufficient indirect light. Sunshades and balconies are an ideal option. Do not water excessively. Water whenever you find the roots dry. During winter, once in 2 days would do. Ensure that the water is drained out through the holes of the pot. 

Generally, chemical fertilizers are used for orchids. There are 2 types of the same. One is meant for the plants which are in the growth process  (Green Care fertilizer -NPK level-30:10:10 ) and the other is meant for flowering (Miracle fertilizer -NPK level-13:27:27). While applying fertilizers, you should take care not to apply the former one on the matured plants which is to flower or the latter ones on newly budding plants. The fertilizers meant for flowering should be applied on ‘matured plants’, after 6 months of its growth, after the leaves, shoots and aerial roots are shown.