As far as I know, sticks cannot be found for sale in shops. Therefore, Chernobog's advice is the best way to go.
Oh and by the way, there is a thread talking about trees locations (and thus, sticks). You'll find it here : http://blog.zombiepandemic.com/Foru...fault.aspx
As for plants, you can buy them at :
- Bryan's hardware shop, map 1, (29,26)
- Autumn Leaves Supply Store, map 2, (32,82)
- Diane Outlet Store, map 2, (19,96)
- Everton Home Department Store, map 2, (19,96)
- Surplus Store, map 3, (51,107)
This is from the notes I took, please let me know if there are any inaccuracies and happy farming !