March is here, and that means time to start thinking about starting seeds indoors.
Northern gardeners struggle with pesky late and early frosts that shorten our growing season, but there are a few things you can do to extend it. Starting seeds indoors is a great way to get a jump on Mother Nature. If you don’t have space to start your own seeds, purchasing seedlings from your local garden center works, too; just make sure to watch the weather!
Watch temperatures
Traditionally, the last frost date for Clay County and surrounding areas is Memorial Day weekend (May 24-27, 2024). This is not a firm date, as we may experience a warmer spring and be able to get into our gardens sooner. However, we need to be prepared for cold weather. If you buy your seedlings, watch the temperatures and 10-day forecasts; tender plants such as melons, cucumbers, basil, and other cold-sensitive plants do not tolerate temperatures under 50 degrees Fahrenheit. Before planting in the ground, check the forecast or have a backup plan in place for a late spring frost or prolonged cool temperatures (blankets, buckets, or other things to protect plants).
Deciding which seeds to start
So, how do garden centers have tomatoes with flowers ready for purchase in April and May? Starting seeds in greenhouses in March and April is common practice; spring seeding allows gardeners to jump on the growing season.
When deciding on what seeds to start, look for vegetables that are suitable for northern growing regions. These can give you an advantage. Many northern varieties of vegetables have a shorter day-to-maturity length (days from planting to harvestable fruits). You can also consider growing vegetables that are compact or have smaller fruits to maximize your harvest.
You’re all in on starting seeds indoors now, but where do you start?
To get started, you'll need:
- A bright light source (grow lights or a full-spectrum light bulb, 12-16 hours of light is recommended).
- Containers/pots.
- A room temperature space and the ability to keep the soil temperature optimal for the types of vegetable seeds you are starting.
- A good seed starter or potting mix.
- Seeds.
Note: The back of the seed packet contains all the information you will need to get those seeds on their way!
Learn more about starting a garden and seeds indoors, or contact Clay County Extension Horticulture Educator Jill Patrie at 218-299-7338 or by email at patri350@umn.edu.