For the Love of Ivy (DETECTIVE COMICS vol. 1 #589, 1988)
After serving her time in Arkham, Ivy was released on parole. But it wasn’t long before she returned to villainy. Her next victim was a TV personality who died from a mysterious disease—after legally granting his fortune to Poison Ivy.
Ivy then teamed up with a second-tier criminal known as the Grip in order to seduce other millionaires and gain their fortunes. But she contracted a fatal, contagious disease that used her immunity to poisons against her. When Poison Ivy finally accepted the truth, she let Batman send her to the hospital for a cure and recovery.
Transplanting (BATMAN: POISON IVY, 1997)
Ivy moved to a tropical island, where she was regarded as a goddess by the natives. Her solitude and happiness were short-lived, however, as the island was firebombed by Russian mercenaries. Determined to avenge the island and its people, Ivy tracked down and killed the inventor of the incendiary gel used to destroy the island, working her way through his network. Her quest for vengeance again caught Batman’s attention.
Batman ultimately took a bullet meant for Ivy while apprehending the mastermind. Ivy was once more sent to Arkham Asylum, and grew convinced that Batman held an unspoken love for her.
Ivy and the Orphans (“No Man’s Land,” 1999-2000)
After Gotham City was decimated by an earthquake and deemed a disaster area by the U.S. government, it was evacuated and abandoned. Poison Ivy deemed all of Robinson Park her territory. While making the park verdant, Ivy came across 16 earthquake orphans and took care of them. Batman saw her love for the children and left them in her care. When law returned to Gotham, Ivy was forced to surrender to the police. She then became convinced the children were poisoned from long-term exposure to her powers, and had Batman help find a way to restore her full humanity.
Harley Meets Ivy (BATMAN: HARLEY QUINN #1, 1999)
During the “No Man’s Land” event, Poison Ivy encountered The Joker’s ex-sidekick Harley Quinn, took her in and befriended her. Even though Harley returned to The Joker, it planted the seeds for a relationship between the two women that usually took the form of friendship. Though sometimes a bit more.
Hush (BATMAN vol. 1 #608-619, 2002-2003)
Poison Ivy attempted to restore her powers via a serum given her by the Super-Villain Hush. While it at first appeared to have killed her, Ivy came back to life in time to help the Riddler with his machinations, and took control of Catwoman and Superman. Eventually, Ivy turned on the Riddler and left him in a catatonic state.
Afterward, Ivy’s powers increased, giving her fuller mastery over plant life. She used this newfound ability to wreak havoc in Gotham City.
The Unholy Three (GOTHAM CITY SIRENS #1-26, 2009-2011)
After saving Catwoman from the new Super-Villain Boneblaster, Ivy brought her to her lair, where Harley Quinn was already living. United, they became the Sirens, and worked together in one another’s best interests. The group eventually went their separate ways, with Ivy and Harley remaining best friends.
New 52 (2012-2016)
Poison Ivy’s first adventures in the New 52 were with the Birds of Prey. She joined the team at the urging of team leader Black Canary, against the wishes of the other Birds. She was apparently killed by Katana, but survived the incident and went on to wreak havoc within the Gotham City underworld.
Ivy’s New 52 origin saw Pamela Isley growing up with a skin condition that kept her from functioning in the outside world. Her abusive father beat and eventually killed her mother, burying her body in Pamela’s beloved garden. During college, Pamela got hold of a pheromone pill that allowed her to control men’s minds, using it to graduate at the top of her class. She also found a deadly toxin that could be secreted from her lips, and used it on her father during a prison visit. She avenged her mother’s death with a kiss.
During an internship at Wayne Enterprises, Pamela tried to convince Bruce Wayne to produce mind-controlling chemicals, prompting him to fire her. She accidentally spilled her experimental chemicals on herself when security tried to escort her out of Wayne’s building, and they granted her powers to control plant life, as well as immunity to all poisons and toxins.
Motherhood (POISON IVY: CYCLE OF LIFE AND DEATH #1-6, 2016)
Ivy was working at the Gotham Botanical Gardens when she created two plant-human hybrid children, Rose and Hazel. She took them in and found a third child named Thorn. The three girls grew to adulthood in mere months. Ivy eventually learned that the head of the institute—Dr. Grimley—had become a plant-human hybrid himself and wanted to harvest the girls to cure his own cancer.
After Grimley was vanquished by Ivy and Swamp Thing, the girls left Ivy’s care to live out the rest of their accelerated lives.
Poison Ivy’s first adventures after DC’s Rebirth saw her building a portal to a dream dimension in Clark Kent’s farmhouse. It turned out to be a plan by the alien warlord Mongul, whom Ivy helped the Trinity of Superman, Batman and Wonder Woman defeat.
Ivy and Harley also took their friendship a step further, acknowledging their romantic feelings for each other.