Winter Care
A major problem in winter is to protect bonsai against low temperatures and drying winds. Bonsai can only be left outdoors in climates where temperatures drop no lower than 28 F degrees. This is not the case throughout most of the United States, so a greenhouse, pit, or coldframe is necessary.
Winter frosts will seldom bother bonsai that are sheltered under the foliage of a spreading tree. Watch out, however, during the frost period for drying soil.
