Because of its majestic stature, the trumpet tree (Catalpa bignonioides) is a popular ornamental tree in many gardens as well as public parks. The deciduous tree originally comes from the mild climate in the south-east of the USA, but was also introduced to Europe in the 18th century. From the age of about four to five years, the trumpet tree is hardy, but younger specimens need good winter protection.
Winter cannot harm older trumpet trees
Young trees need winter protection
Freshly planted and trumpet trees younger than five years are not yet sufficiently established at their location and not sufficiently hardened for the typical Central European winter. This hardening only takes place with increasing age, so that young trees should definitely be protected from frost and other weather-related adversities. In addition to frost, too much moisture can also be a problem - especially if a wet period is followed by a frosty period, after which the swollen bark freezes and finally cracks. Only whitening the trunk helps against this. Further protective measures consist of covering the trunk and crown with gardener's fleece or reed mats.
White trumpet tree properly
Before whitening the trunk, you should first carefully clean it of moss and lichen and apply a good wound sealant. The tree is then painted with a special paint that is compatible with plants. Alternatively, straw and reed mats also protect against excessive solar radiation.
Protect trumpet trees in the bucket
Cuttings and younger trumpet trees can be cultivated in pots, although if possible they should not be left outside. Since planters naturally contain little soil, the roots are not adequately protected from frost and can therefore freeze back. On the other hand, it is better to overwinter these specimens frost-free but cool. But you can also try to pack up both the pot and the tree well, place them on a thick polystyrene base and push them close to a warm house wall.
tips
Older trumpet trees in particular can be prepared for the winter by thinning them out in good time in August and removing diseased, weak and dead wood.