understanding when to start seedlings indoors

Asked February 18, 2014, 10:45 AM EST

Not sure when last frost is and how to calculate when to start my seeds for spinach, tomatoes, peppers, and squash...will eventually move to containers outside

Delaware County Pennsylvania

1 Response

There are lots of factors that affect planting time including the last frost date. This can vary from year to year. Fortunately, there is typically a window range of dates that provides some margin of safety. Here is a link from the Philadelphia Master Gardeners website that provides a table to help you understand when to plant indoors and when it is likely to be safe to plant outdoors.


This link should answer all of your questions. Good luck.