How do i defeat poison ivy?

Answer from: Hotseff
You defeat her goon with a batorang or robinorang then use water to clear the goo use batman's super strength on the orange bars then build the mower to cut the plant the spin the wheel

Answer from: helperperson
You have to use your batterang or a projectile when and you have to time it just right for when the time is right throw it but first use that technique on her minoins

Answer from: Superstuck
Iv tried spraying with water and throwing batmans explosives nothing seems to work! Please help me and my son are very confused. thanks

Answer from: crud
To beat her you have to destroy the other 2 flowers with a batarang right when they open up

Answer from: kcline40
After you go to fight Poison Ivy, she disappears to another room. There are 3 rooms. 1 is located on the 2nd floor. The other 2 are located on the 3rd floor. Go to the second floor and find her. You will see a yellow arrow with where she is at if you have cheats on. Follow the arrow. After you have found her in the first room on the 2nd level go to the the 3rd level and then search both rooms she will be in one of them. Then go to the room opposite of the last room and finish the battle there. After you have beat her you can purchase her.

Answer from: brickhand
I don't understand how to make her appear on the 2nd floor. The arrows point behind a wall, but she is nowhere to be seen, she has left the first floor and not on the 3rd. How do I break the wall?

Answer from: epikness
If u carry on then there will be a hole in the wall and u c her there