@ImmedicableME@gardening if you're in the United States, check our your county/state ag extension office's website. They'll have some guides on seed starting and what to plant when. If you want a book, the Square Foot Gardening book (any edition) has a section on plants with info about direct sowing (that's the search term you need) and when to do it based on frost dates! I've seen a copy at most libraries, including the ebook one.