有意栽花花不發，無心插柳柳成陰 [－－－－－－发－无－－－－－阴]

Jyutping jau5 ji3 zoi1 faa1 faa1 bat1 faat3 , mou4 sam1 caap3 lau5 lau5 sing4 jam1
Pinyin yǒu yì zāi huā huā bù fā , wú xīn chā liǔ liǔ chéng yīn

Definitions (CC-CEDICT)
  1. lit. you plant a garden and the flowers do not bloom, you poke a stick in the mud and it grows into a tree
  2. fig. things do not always turn out as one would expect
  3. well-laid plans may fail, and success may come where you least expect it