Alyssum, calendula, and delphiniums also take about 6–8 weeks to grow, but these can go outside a little earlier: 1–2 weeks before the last frost. 8–10 Weeks These annuals are slower to germinate and take 8–10 weeks to reach a good size for the garden. They can go out on th...
Seedsshould be collected when they start to dry on the plant. With some like Calendula, you can pick off the seeds as they dry. With others like Dill, you can cut the stem, and hang the entire stalk of seed heads upside down over a paper-lined tray or in a paper bag . Seeds will...