Concerning the proper type of container for sowing seeds. Try this. Fill a 4" plastic pot with soil 1/2" from the top. Cut the bottom out of an empty 2 liter soda bottle. (This should be done no higher then 1" from the bottom, any higher and the bottle will be too large for the pot.) Seed, water, place the bottle on the pot (small pieces of tape will hold it snug). If your "greenhouse" gets too warm or wet, remove the cap, otherwise it won't need any attention until planting in the garden.