- Speeds germination and seeding growth with gentle bottom heat. - Gro-Quick resistance electric soil warming cables are to be buried in soil or soil-based mixtures so that no portion of the colored heating section is visible while in use. - Built- in thermostat automatically activates cable when soil temperature is below 74 degrees. - Starts seeds and plants early, just like the professional growers. - Gives you a big head start on the regular growing season. - Color: Yellow & White.