What vegetables can I winter sow in zone 6b?
Sow cold-hardy perennials or annuals. For me in zone 6, sowing time is February and early March. Examples: Brussels sprouts, Monarda (bee balm), pansies. This group also includes vegetables we can grow in winter (with some protection). Starting seeds indoors revolves around the last spring frost date and your growing zone will have an estimated last spring frost date listed. Zones 4-6 generally have moderate summers with cold winters; last spring frost dates are usually in the month of May, with the first autumn frost dates being in October.