The beginning of spring planting has begun.  This greenhouse is 24' wide x 48' long and is heated by propane.  The structure is metal pipe, covered by plastic.  We replace the plastic when it gets cloudy, which is usually every 4 years.  The metal pipes hanging down are called collar ties and are used to support the greenhouse under heavy snow load.  Being from Maine, I"m genetically programmed to have every structure on the farm able to withstand at least 22' of snow.  This makes it easier to sleep when we are having only 3'.  The circulation fans are essential.  They operate continually and function to move air, preventing disease.  The floor is covered with a weed-proof fabric and the strips on the floor are wooden slats to keep the flats elevated off the floor.  The white pipe with risers is the irrigation system.    Sitting on the wooden slats are the flats, which measure 11" x 22", and have 128 cells.  Each cell has one seed and the goal is to have 128 plants in each flat.