Oncidium Twinkle 'Pink Profusion' orchid The Orchid Gallery an easy to grow Blooming Size orchid. Anybody can grow these orchids successfully, and once they reach maturity, they can produce just clouds of little pink flowers. Some award winners have had almost 500 flowers open at once.The breeding is Oncidium cheirophorum x Oncidium ornithorhynchum. Medium light and water are best, fertilize weakly twice a month. Water when almost dry, but don't allow to dry out completely.