花 + 开 + 了 / 开满 + Flower Noun
The separable verb 开 (kāi) can mean 'to bloom' or 'to blossom' when used with flowers. In this usage, it describes the opening of flower petals. Phrases like 开满鲜花 mean 'covered with blooming flowers,' where 满 indicates fullness.
春天到了,院子里的桃花都开了。
Chūntiān dào le, yuànzi lǐ de táohuā dōu kāi le.
Spring has arrived, and the peach blossoms in the yard are all in bloom.
这种花一年只开一次。
Zhè zhǒng huā yī nián zhǐ kāi yī cì.
This kind of flower blooms only once a year.
路边开满了金黄色的小花。
Lù biān kāi mǎn le jīnhuángsè de xiǎo huā.
The roadside is covered with small golden flowers.