Cymbidium Orchids. Featuring waxy, long-lasting flowers in winter or early spring, these have an easy-care nature. To Grow: Cymbidium orchids prefer bright light. In fact, thye can be kept outdoors in a shady spot for the summer. Water them weekly to keep them from drying out. For best bloom, fertilize them monthly in spring and summer. Preferred temperatures-50 to 70F.