With its fan-shaped fronds, Washingtonia robusta is an attractive palm tree that is also popular in Germany. However, since we do not have the climate of Mexico, a challenge awaits us every year at the end of autumn: safe wintering.

Washingtonia robusta only survives winters in very mild regions

Palm survives only very light frost

Washingtonia robusta, also known as the Washington palm, petticoat palm or priest's palm, is hardly hardy, although it tolerates cold well. But while it still sprouts at 5 °C, it becomes life-threatening for them at temperatures just below zero.

Washingtonia robusta should never feel more than -3 °C. When it gets colder, frost damage occurs to the leaves. If the thermometer falls below -8 °C, the entire palm tree dies. Therefore, this type of palm is not suitable for permanent residence in the garden. A large, mobile bucket is ideal for her so that she can get a breath of fresh air during the warm season.

Safe hibernation in the winter quarters

Anyone who owns a greenhouse can put the palm tree in from the first frost. However, other rooms that are as cool as possible with light are also suitable for hibernation, provided they offer enough space and are easily accessible. Warm places like the living room can also serve as winter quarters if necessary. However, there is a risk that dry heating air will make the palm more susceptible to diseases and pests. During the winter, the palm must continue to receive care:

  • water occasionally
  • the warmer the palm tree is, the more light and water it needs
  • Spray regularly with water in very warm places
  • don't fertilize anymore

tips

When the palm tree hibernates, blazing sun should be avoided at first, as it can burn the fronds. First place them in partial shade for two weeks.

Outside only with winter protection

Young palms and tub specimens cannot survive outside. In mild regions of the country, an older petticoat palm can be planted out. It should definitely be rooted in a sheltered place, otherwise it may fail to hibernate. Further, extensive winter protection measures are essential to protect them from frost and moisture:

  • place a mobile, heatable greenhouse over the palm tree
  • alternatively wrap the trunk with a heating coil
  • also heat the top layer of earth
  • Cover palm fronds with breathable fleece

Category:

Trees