Simply put the seed flats in a 40-degree refrigerator for another three to six weeks and then return them to 70 degrees.
When seed flats are placed on them, the soil is kept warm evenly, usually 15 to 20 degrees above the room temperature.
You can also try growing cilantro indoors under grow lights, placing the lights five or six inches above the seed flats.
Soak them in water for 24 hours and then sow them in seed flats for eventual transplanting, or place them directly in the garden.
His seed flats were still bare by the first of May, so he threw them out into the flower beds - where they came up like a thick, green carpet.
Then sow them in seed flats or a separate, small nursery bed, then transplant them to their permanent homes in three weeks.
Whole rows of vegetables in this second planting might follow early plantings of bush beans or sweet corn, or you can sow in seed flats for transplanting three weeks later.
I tossed them all on seed flats, labeled the rows, stuck them in plastic bags and set them on Grandmother's old marble sideboard.
It is the white globular substance often seen in potting mixtures and seed flats because it tends to rise to the surface.
Other gardeners have had great success by placing their seed flats in a cold frame.