Germinating Tomatoes In The Greenhouse

Q.  I have had trouble getting my tomatoes to germinate in the greenhouse.  Is there a variety that you would suggest? I live at 41 degrees North latitude and 5,000 feet elevation. Any additional advice would be appreciated.

A.  Tomatoes need a constant sustained temperature in the 70’s for good germination. Get a good thermometer, then insulate your greenhouse as much as possible, without losing light. Heating the entire greenhouse is too expensive, enclose the table where your plants are growing in clear plastic and heat only that space, thus creating a greenhouse within a greenhouse.  We use heaters this time of year, either propane, kerosene, or electric in order to sustain good growing temperatures for tomatoes and other warm-weather plants.