花 can mean medley or multitude, and 生 means to give birth/give rise to… which makes our humble peanut a symbol of fertility and longevity.
Its best friend is the persimmon 柿子 which reminds us of 好事 (good things). So, when we pair persimmon 柿 (shì) with the peanut 花生 (hūashēng), it sounds like:
好事发生 (hăoshìfāshēng) — May good things happen If my intentions are good, whatever happens is good enough!