A passive ability gained by having Lifebloom active on a target so you don’t need to worry about it so much, but it’s worth mentioning. It gives you a Clearcasting buff, which makes your next Regrowth cost no mana. Try and use it whenever it procs.
Omen of Clarity
Requires: Level 48
Your healing over time from Lifebloom has a 4% chance to cause a Clearcasting state, making your next Regrowth cost no mana.