This is Wisconsin after all, so there is plenty of time before planting season begins. Plenty of time to research plants and plan gardens. The library has many books to help.
The Garden Book For Wisconsin by Melinda Meyers, 635,0977 MYE
Gardening in Wisconsin Month By Month by Melinda Meyers 635.0977 MYE
Perennials For Every Purpose by Larry Hodgson, 635.9 HOD
Tending Your Garden by Gordon & Mary Hayward 635.9 HAY
These and many more titles are available at the library.