List of pertinent information for the keyword "heated soil cable": 1. Heated soil cables are used to create a propagator for starting seeds. 2. The greenhouse is only functional from April to May. 3. The author is interested in the cost of running these cables. 4. The current method of using windowsills works temporarily. 5. Heated soil cables warm the growing medium for faster germination and better growth. 6. Heated soil cables can be used indoors or outdoors. 7. They can be used in containers, cold frames, or directly in the ground. 8. The cables have a built-in thermostat that maintains a temperature range of 77°F - 85°F. 9. Heated soil cables operate on 120 volts. 10. They are recommended for seasonal use. 11. There are three length options available: 12 ft (32 watts) covering 3 sq ft, 24 ft (80 watts) covering 6 sq ft, and 48 ft (140 watts) covering 12 sq ft.