The mat provides bottom heat which signals the seeds to begin germinating. Large enough for a standard starter tray, this 10″ x 20″ mat will work well with any Jiffy seed starting kit. Easy to use; simply plug it in and the mat will maintain the optimum temperature range for most seeds to germinate.
 

Designed for indoor use only. Maintains a range of 70-85 degrees. After seeds have germinated and are sprouting up, remove seedling tray from heat mat and place seedlings in a sunny window or under a grow light.