When do you start seeds in a greenhouse I live in a zone 4?

Answer 1

depends on the type of seed you want, are you going to leave in greenhouse or plant outside. look on seed packet it will tell you most of the time.much of the time six to eight weeks before last frost date.

Answer 2

In Zone 4, start seeds in a greenhouse 6-8 weeks before the last spring frost date, which is typically in early to mid-May. Be sure to adjust your planting schedule based on the specific needs of the plants you are growing. Consider using a seed starting tray with a heat mat to provide optimal conditions for germination.