咲いてる

is blooming, is in bloom

→ 咲く
咲い bloom + Te-form (conjunctive) + Plain nonpast
verb · present indicative Rare #37,125
is blooming, is in bloom Colloquial contraction of 咲いている.
JA: 庭の桜がきれいに咲いてる。
EN: The cherry blossoms in the garden are in full bloom.
Conjugation of 咲く
Indicative present
咲きます咲いてる

桜が咲いてる

The cherry blossoms are in bloom.

庭にたくさん花が咲いてる

There are lots of flowers blooming in the garden.

咲いてる

The flowers are blooming too.

— どん底作家の人生に幸あれ! (2019)

庭に赤い花がたくさん咲いてる

There are lots of red flowers blooming in the garden.