be in leaf
US /biː ɪn liːf/
UK /biː ɪn liːf/

1.
in blad staan, bladeren hebben
to have leaves, especially after a period of not having them (like in winter)
:
•
The trees will soon be in leaf again.
De bomen zullen snel weer in blad staan.
•
By spring, all the bushes should be in leaf.
Tegen de lente zouden alle struiken in blad moeten staan.