开花
to be producing flowers
The apple trees are in full bloom (= completely covered in flowers). 苹果树开满了花。
If I were you, I'd visit in April or May when all the flowers are in bloom.
Bees are required for pollination when the almond blossoms are in bloom.
The cherry trees were all in bloom and it was so beautiful.
The roses were in bloom and the air was thick with scent.
Go and visit the gardens while the tulips are in bloom.
See also: bloom noun (FLOWER)