In Vietnam, Phalaenopsis has been increasingly known by customers, and the major part of demands for this flower focuses on the lunar New Year (Tet). However, the Phalaenopsis production in Vietnam is not well-developed
moreover, the researches on this orchid are still in the small scale. During years of 2009-2010, Fruit and Vegetable Research Institute have conducted researches on technical methods to treat the flower bud differentiation of Phalaenopsis in both artificial and natural conditions, and then apply this result in the large scale production. The achieved results showed that: the suitable age of Phalaenopsis to be treated for flower bud differentiation is 18-20 month-old. Suitable temperature regime for flower bud differentiation of Phalaenopsis in the artificial condition of the Red River Delta is night/day temperatures of 24°C/14°C. It is possible to take the advantage of the natural condition in such high mountains as Sapa - Lao Cai for the flower bud differentiation to be treated. With expectation of Phalaenopsis producing flowers on the lunar New Year (Tet), the best time to begin the treatment is on 19th September (or 1st August according to the lunar calendar). During the treatment period, adding more the Plant - Soul fertilizer (N:P:K ratio is 9:45:15) that is dissolved by water with fertilizer/water ratio of 4grams/ 101iters, which will be sprayed periodically 7 days/one time, will shoten the treatment time to 32 days and increase flower bud rate up to 96.5 percent.