Go to your local green house tell them where it is tell them what you want to do to it ask them how. And ask them how to do it without you catching the poison oak yourself that stuff is terrible to get rid of if you once catch it.
Well, you can pull it up from the ground making sure that you get the roots and all. Ortho Brush-B-Gon make a herbicide that will kill them, but it will also kill any other plants around.
Leaves of 3, let them be
