When the trees do not have leaves it is time to plant	As long as trees show their leaves it is no planting time

Trees are planted in Winter. The soil, however, has to
be free of frost. In winter the trees come to a rest, there is
almost no activity in and around the roots.

Deciduous trees lose their leaves in Autumn. This way they
show that they are ready to be transplanted. Planting time
comes to an end in Ferbruary (applies to middle of Europe)