The right time to start your seeds indoors varies significantly by crop and location, ranging anywhere from 2–16 weeks prior to transplanting. Use this calculator to ascertain when to start seeds indoors and then to transplant outside, based on the frost-free date in your area.

2025年2月24日 · As a general rule, seeds are started indoors about 6 weeks prior to your last frost date. During a cold spring, it’s better to delay sowing to ensure the soil temperature is warm enough than to be hasty and get disappointing results. Here are three tools to determine the best date to start your seeds where you live. Read your seed packet.

Start indoors six to eight weeks before the last frost. Direct-sow outdoors in early spring as soon as the ground can be worked. Growing instructions: Thin plants to 12 to 18 inches apart in full sun to partial shade and in fertile, well-drained soil.

2025年2月11日 · Just like vegetables, annual flower seeds can be started indoors, too. Here is a short list of the best annual and perennial flowers that can be seeded indoors. When Should You Plant Flowers? Let’s Get Growing! See our article with tips on how to start seeds indoors!

2025年1月4日 · Most seeds are started indoors about 6 to 8 weeks before the last frost date of spring. But planting schedules will vary depending on your growing zone, your area's frost date, and the types of seeds you’d like to grow. Before you start planting, familiarize yourself with your last frost date and read your seed packets carefully.

2025年1月26日 · Here is an expanded guide to when to start seeds indoors for various vegetables, herbs, and flowers: *Indicates plants often direct-sown but can be started indoors in short growing seasons. Adjust for microclimates: Your garden’s specific conditions (e.g., urban heat islands, elevation) may affect timing.

2023年2月7日 · Starting Perennials From Seed. Perennials rarely flower the first year from seed. Some will flower the second year, and some, like peonies, will take 5 years before they flower. For this reason it is less important to start perennials early. Many can be started using the simple ‘6 weeks before last frost date’ rule.

2025年2月17日 · Read all about planting and caring for perennials here! You can also start seeds indoors in in springtime. See the chart below. How Long Do Perennials Take to Grow? 8-10 Weeks. Many perennials take 8 to 10 weeks to reach a good size and can be transplanted on or after the last frost date:

2025年1月10日 · When to Start Seeds Indoors. In most cases, 6-8 weeks before the last frost date in your area is when to start planting seeds indoors. This will allow the little plants enough time to develop strong roots before you harden off seedlings and plant them outside.

Tips for starting seeds: Start seeds indoors eight weeks before last spring frost; seeds may take up to a month to germinate. Or sow seeds outdoors right in the garden about three weeks before your average last spring frost.