In blossom

Also found in: Idioms.
having the blossoms open; in bloom.

See also: Blossom

References in classic literature ?
In May and June come pinks of all sorts, specially the blushpink; roses of all kinds, except the musk, which comes later; honeysuckles; strawberries; bugloss; columbine; the French marigold, flos Africanus; cherry-tree in fruit; ribes; figs in fruit; rasps; vineflowers; lavender in flowers; the sweet satyrian, with the white flower; herba muscaria; lilium convallium; the apple-tree in blossom.
The night was so very still that one should have been able to hear the whisper of roses in blossom -- the laughter of daisies -- the piping of grasses -- many sweet sounds, all tangled up together.
Although this would seem to be a long flowering season, it only lasts in each place for a short while and its impact lies in the fact that the cherry trees are suddenly and completely covered in blossom.