The perfect green leatherette dress from miss selfridge i bought last year (i will be wearing the costume in the alps so the leotard would be too cold!)
http://www.femalefirst.co.uk/image-library/port/333/m/miss-selfridge-dress-45-zip-green.jpg

I have red hair so i dont have to buy a wig me and my sister figured the best way to get my hair like hers was to get two hair curlers and wrap my hair around them because its not thick enuf! (However i have seen some good poison ivy wigs that already have those beehives in them they are pricey enough tho)
http://cgi.ebay.ie/POISON-IVY-BATMAN-ARCH-FEMALE-RIVAL-WIG-WIGS-THEATRICAL_W0QQitemZ390038729906QQcmdZViewItemQQptZUS_CSA_MWA_Wigs_Extensions?hash=item5ad01eb4b2

Tights i have orderd from ebay they were only 2.50

For the boot covers and arm pieces i have ordered 3 meters of green material off ebay (hopefully i will have enough to make a cape as well) Around 15 euro

I bought some artificial flowers for 2 euro in a cheap shop i plan to cut off the leaves and paint gold around the edges to make them stand out. Then i want a way to make it seem like they are crawling up my legs and around my body so i bought some thin green ribbon to sew them to i hope this will work!

Eyebrows … I have plenty of green eyeshadows and eyeliners and managed to do a really good job of painting them on that way it really wasnt hard but my brother suggested making the eyebrows out of felt and sticking them to my face (still not sure which i will do so havent ordered anything). I did find a good tutorial on how to make the eyebrows tho http://deadlygarden.blogspot.com/2009/07/poison-ivy-leaf-eyebrow-masks-tutorial.html