Starting plants from seed is a great way to garden mid-winter – get your hands dirty, smell soil, see green – and to enjoy the simple satisfaction of growing your own plants from seed to harvest.
Starting seeds indoors is not difficult, but seeds have basic needs for good germination and healthy growth.
If you’re a first-time seed-starter, learn with just three or four seed varieties. It doesn’t look like much, but each seed packet is capable of producing dozens of little seedlings.
Read the seed packet to find out how many weeks each variety will need to grow indoors.
Successful growing starts with the right growing medium. Garden dirt or regular potting soil is too heavy. Use fresh, seed-starting mix, available at garden centers or wherever you purchase your seeds. Thoroughly moisten the growing medium with warm water, and fill your containers to within 1/4 to 1/2 inch of the top.
Scatter the seeds on the soil surface or place individually into each growing cell. Don’t sow seeds too thickly. Read the seed packet for specific planting instructions. Use a mister or just drips of water to gently moisten the growing medium. Label each flat, row, or container so you can identify them later. Save the seed packet for reference.
Some gardeners cover their flats or containers with clear plastic until the seeds germinate. This helps trap heat and moisture. Seed-starting kits are readily available and can be a big help. They usually include an attached set of good-sized containers, a tray to set them on and a clear lid to hold in humidity during the early stages.
At this stage, seeds don’t need much light, but they do need warmth to germinate. Set the containers on top of a refrigerator or dryer, or purchase special heating mats sold for this purpose. Check the soil every day. It needs to be moist but not soggy – you don’t want the seeds to rot. Your seedlings will be much happier if you water them with room-temperature water rather than ice-cold tap water. Most seedlings like a humidity level of 50 to 70 percent.
When the sprouts are about half an inch tall, it’s time to turn on the light – and turn down the temps. Room temperature, between 60 and 70 degrees will be ideal.
Seedlings need 14 to 16 hours of direct light to manufacture enough food for healthy stems and leaves. If your plants grow leggy, they’re not receiving enough light.
Once your seedlings develop a second set of leaves, they’ll need fertilization. Use a liquid fertilizer at half strength doses until they are three or four weeks old. After that, fertilize weekly according to the directions on the fertilizer package.
At least one week before you plan to transplant your seedlings into the garden, take them outdoors for an hour or so each day, ideally on a protected porch. Gradually increase the amount of time outdoors. Be sure to protect them from too much wind and hot sun.
Gardeners are always eager, but if we’re have a cold spring, be patient. After weeks of nurturing your seedlings, you don’t want to lose them to a late frost!