What Kind of Soil to Use to Germinate a Seed?

Starting Seeds Indoors

• Commercial seed starting mixes are ideal for starting seeds indoors. These mixtures are usually soil-less and contain vermiculite and peat. They are sterile, weed-free and have a light texture that holds moisture, but allows seeds to germinate freely. Plant seeds in individual containers for best results and mist them frequently with water so the starting mix stays evenly moist.

Homemade Potting Mix

• To make an economical potting mix at home, sterilize garden soil first. Place slightly moist soil in a baking pan and cover it with aluminum foil. Heat the soil at 250 degrees Fahrenheit until the soil reaches 180 degrees, as indicated by a food thermometer. Cook for an additional 30 minutes. Remove the soil and allow it to cool. Mix equal parts pasteurized soil, sand or perlite and peat moss to make a lightweight potting mix.

Outdoor Growing

• The best soil for outdoor seed germination is one that has a light texture. Remove rocks, sticks and large clods of dirt before planting seeds. Amend the soil with compost or manure to improve texture and drainage. Rake the soil so it is light and level. Once seeds emerge, mulch the soil with untreated grass clippings, straw or wood chips to retain moisture and prevent a hard crust from developing on the soil's surface.

General Recommendations

• In addition to providing seeds with a lightweight growing medium, increase your odds for good seed growth by keeping the soil evenly moist, but not soggy. Most seeds, including vegetables, germinate best when temperatures are between 68 and 80 degrees Fahrenheit, although a few seeds, such as poppies, prefer cooler temperatures. Seeds vary in their light requirements for germination, as well. Read seed packet labels carefully to provide the optimal growing conditions.