How sweet! Poison Ivy created a secret garden called Eden for her best friend Harley Quinn, for times when she needs to get away from the Joker and just recuperate or get her head on straight. Some of the plants in the garden are ready to be used as antidotes for the Joker venom strain.
From – Batman Vol. 3 #97
Man, you’d think they would’ve at least mentioned this in her many solo issues with Ivy, but it’s still cool.