Method for overwintering bougainvillea speetabilis container seedlings

The invention discloses a bougainvillea speetabilis container seedling overwintering method and relates to the technical field of bougainvillea speetabilis cultivation. The method comprises the following steps: using a cold-resistant agent: 2-3 days before cold air arrives, uniformly spraying the cold-resistant agent for assisting the bougainvillea speetabilis container seedlings to overwinter on the front and back surfaces of leaves of the bougainvillea speetabilis container seedlings; spraying the cold-proof agent for assisting the bougainvillea speetabilis container seedlings in overwintering once on the day when low temperature comes in winter; 5-10 days before cold air arrives, the bougainvillea speetabilis is subjected to cold-proof cloth covering treatment; the cold-proof cloth comprises a waterproof film and a cold-proof fiber layer. The method solves the problems of damage and economic loss of bougainvillea speetabilis container seedlings in nursery gardens in the middle Yunnan region caused by low-t