How Early to Plant Vegetables From Seed in Zone 5

I live in zone 5 and am anxious to get a jump start on the season. I wanted to start my vegetables from seed this year. How soon do I begin?

Onions can be started in mid to late February. Mid March is a good time to plant cool crops such as cabbage, broccoli and cauliflower. Plant peppers and eggplants the beginning of April. Wait until the middle of April to start your tomatoes. Gardeners in colder zone 4 should wait an additional one or two weeks to start their seeds. 

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