Three characters with the grass radical
The grass radical is the three strokes at the top. Draw the horizontal one first. (Although drawing the first vertical one before the horizontal one does produce rather a nice shape!)
花 Huā 'flower'
The sound is coming from 化 huà as in 化学 huàxué 'chemistry'.
草 Cǎo 'grass'
The sound is coming from 早 zǎo 'early'.
茶 Chá 'tea'
The sound doesn't have much to do with 余 yú 'surplus'.