Winters seem extra long to the avid gardener. As those cold, dreary days slowly trudge forward, the urge to get your hands and knees dirty, gets stronger. You can get a jumpstart on spring planting by sowing your seeds in the nursery in the winter. Begin the process three weeks before the last frost in your area.
Fill the seeding flats with seed starting mix to within 1 inch of the top of the flat. Water the flats well and allow the excess water to drain from the bottom of the flat.
Sow your seeds, according to the type of flower you are going to grow. Some seeds require darkness in order to germinate and others may require bright light. This means that the planting depth of some seeds will be deeper than others. Make sure to read the seed germination requirements on the back of the seed package and sow your seeds accordingly.
Place the seeding flats in an area of the nursery that provides the appropriate amount of light. If you have a dark corner of the nursery, that could be the ideal place for seeds that need less light for germination. For light-loving seeds, place the flat in the brightest location in the nursery.
Plant spring-flowering bulbs in pots. Fill 6-inch pots with planting mix and bury the bulb in the soil so that the tip is within one inch of the surface of the soil. Water the bulbs well and put the pots in a cool, dark area of the nursery. Water the bulbs when the top inch of soil is dry.
Mark your flats and pots so that you will remember which flower is being grown in each one. This can be done with plant identification tags, available at larger gardening supply stores.
Raise the flats and pots off the ground by placing them on overturned plastic milk crates. This provides just enough elevation to keep them from sitting in any standing water in the nursery.
Provide the proper temperature for seed germination, if you are growing tropical flowers. Most of the tropical flower seeds will need bottom heat, requiring the use of a heat mat and, generally, a greenhouse to provide humidity.
Water the seeds as they germinate so that the soil is kept moist but not soggy.
Re-pot the flower seedlings into individual pots, filled with potting soil, when they reach 4 inches in height. Tropical flowers should be slowly weaned from the greenhouse environment by leaving them out in the nursery for longer periods each day for two weeks.