When is the best time to tear off the film wrapped on the sprouting stems of the old pile of happy trees?

About 15 days. After inquiring about the maintenance knowledge of the happiness tree, we know that the happiness tree should be placed in a suitable temperature environment, which should not be lower than 5℃, otherwise it will affect its survival. Generally, after the bare branches of happiness trees are coated with film, the mildew can be removed after the seedlings germinate 15 days. At this time, the happiness tree has adapted to the environment, and the film no longer has any protective effect on it, but may hinder its normal growth.