1. Fact 1
The first thing Snape asks Harry in potions class is," Potter! What would I get if I added powdered root of asphodel to an infusion of wormwood?"
According to the victorian language of flowers, asphodel is a type of Lily meaning, " my regrets follow you to the grave," and wormwood means " absence" and symbolizes bitter sorrow.The entire question has a hidden meaning of " I bitterly regret Lily's death."