A three-inch plastic pot is large enough to start between one and two dozen seedlings. Fill the pot with moisten soilless starting mix. Using the bottom of another pot, tamp the soil in the pot. Scatter the seeds evenly on the surface of the soilless mix. Do not crowd the seeds.
Some seed packets contain hundreds of seeds.
Planting that many seeds would make it extremely difficult to seperate the seedlings when it is time to move them to individual pots. Crowded seedling do not grow well. Cover the seeds with a layer of soillless mix as directed on the seed packet. Some seeds require light to germinate and are not cover at all. In general, seeds are covered to a depth twice the diameter of the seed.