菠 rarely stands alone; it almost always appears in compounds like 菠菜 (bōcài, spinach) or 菠萝 (bōluó, pineapple). Learn the compounds, not the bare character.
memory
菠 = grass radical 艹 over 波 (bō, wave). Picture spinach leaves rippling like waves — and 波 also gives you the sound.
