The charts below provide information on what vegetables should be started from seed indoors or what should be direct sown; and when you should be starting seed indoors for Zone 5; and courtesy of Joe Garderner, a soil temperature/germination chart for many vegetables.  Click the button below each chart to open a downloadable PDF. 

What to Start Indoors or Direct Sow

When to Start Seeds Indoors

Seed Germination / Optimal Soil Temperature Chart

Courtesy of Joe Gardener/joegardener.com