I get lots of questions from new growers on when to start plants in the greenhouse to be the right size for transplanting. Here are two excellent charts on seed starting dates and dates to set out transplants into the fields. Of course, you can start earlier if you plan to use a high tunnel or other methods to plant early for the best prices during the earliest part of the season.

Additionally, the attached chart lists spacing details.

Planting Dates – Vegetable Seeds and Plants