Following are some resources to help gardeners plan their gardens:

Common Crops for Community Gardens​
Free Printable Garden Planner from My Frugal Home
​Gardening Basics from The Creative Vegetable Garden 
Madison Area Planting Time Chart
Sample Planting Schedule
Seed Starting Guide
Soil Temperature Planting Guide
Succession Planting
Vegetable Cultivars and Planting Guide for Wisconsin Gardens
The Vegetable Garden from UW Extension
​​Vegetable Planting Guide
​Wisconsin Vegetable Planting Calendar from Urban Farmer
​​Youth Gardening from UW Extension
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More added soon.  Check back often.