Draw a plan for the interior of the greenhouse onto a piece of graph paper. Measure the greenhouse interior and plot it out on the paper. Cut up sections of a second piece of graph paper to represent the work or potting table, growing tables and a heating unit. The squares of the paper will match the measurements used for the interior drawing. For example, one grid square may equal 1 foot on the greenhouse drawing and the work table cut-out.
Place the paper cut-out for the heating unit on to the greenhouse sketch. Draw in a line to mark each doorway and the area where water will be accessed through a spigot or sink unit. Plan for open space around the heating unit and water source.
Place the work-table or potting-bench graph-paper cut-out onto the main greenhouse drawing. The work table should be located in an area, preferably a corner space, where the gardener can have easy access to supplies and an unobstructed view of the greenhouse interior. Plan to set up a small set of shelves or bookcase nearby to hold books and tools that need to be protected from water and dirt on the work table.
Place the paper cut-outs of the growing tables around the interior of the greenhouse. Place growing tables end-to-end lengthwise to create a long, solid table. Leave 2 to 3 feet of space for a walkway on both sides and ends of the tables to make room for watering, garden-cart plant transport and plant maintenance. Growing tables are set against the walls of a small hobby greenhouse.
Add in a support system for hanging containers and plants, allowing for headroom of at least 5 1/2 feet from floor or ground to the hanging-plant pot support.
Tape or glue the cut-out shapes in place on the greenhouse interior drawing when the best setup is determined.