Need to get your seeds organized? This show two smart storage systems. Mark your calendar and sow a new group every two weeks.Organize your seeds by their sowing groups (1-5).My last frost is approximately May 15 which, according to the chart, means seeds that should be started 12 weeks before last frost (Group 1) should be started on (or around) February 15. When to Start Seeds Indoors Here’s an example Your seed packet will list the required indoor growing time. For example, one type of broccoli might be in Group 2 but another could be in Group 5. For example, if the instructions say to sow indoors 10 weeks before last frost, that’s Group 2.ĭon’t worry if you are not exactly on schedule-I often get a few weeks behind but it all works out.Īlso keep in mind that different varieties have different timing. This tells you the approximate date to start each seed group.Ĭheck your seed packet. Next, find the date closest to your average last frost date on the chart below. Tips: Understanding Frosts & Freezing For Gardeners.Enter your city and state or province to find your first and last frost dates and number of frost-free days. Average Frost Dates | Use this calculator at.

These are listed on seed packets and plant tags to guide your choices. Plant Hardiness Zones | United States | Canada.

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