Jump Start Heat Mat Jump Start 20×20

The Jump Start 20″ x 20″ Seedling Heat Mat (45W) is a durable, waterproof, and UL-listed mat designed to improve seed germination and cutting success by warming the root zone 10–20∘F raised above ambient temperature. It is 50% thicker than standard mats, features a 6-foot power cord, and provides uniform heat for optimal growth.

• Optimal Temperature: Increases root zone temperature by 10–20∘ ideal for fast, consistent germination.
• Dimensions & Power: Measures 20 inches×20 inches (50.8 cm×50.8 cm) and operates at 45 Watts.
• Durable Construction: Built with heavy-duty materials, often 50% thicker than competitors, to withstand damp greenhouse environments.
• Waterproof: Sealed construction ensures safety and allows for easy cleaning.
• Convenience: Features useful planting, watering, and lighting information directly on the mat. 

• Pair with Thermostat: To prevent overheating and maintain a specific, precise temperature, it is highly recommended to pair the mat with a digital heat mat thermostat.
• Placement: Suitable for use with standard, large, or multiple smaller seed trays.
• Safety: Ensure the surface under the mat can withstand warmth; do not immerse in water. 

These thick plastic Seedling Heat Mats have an embedded heating wire inside. Because the thermostat is outside the mat, the heat given off by the mat is related to the temperature of the surrounding air. So, when the room is cool, the mat is 5-11°C (10-20°F) warmer than that. And when the room or cold frame is warm, the mat is much warmer. In late spring when the surrounding temperature (not soil temperature) is over 24°C (75°F), it is best to unplug the mat so that the seedlings do not become too hot. Direct sunlight will overheat the air surrounding your flats and cause overheating as well.

ZHG127 – 20 x 20″ (fits two trays). Shipping Dimensions: 52 cm x 9 cm x 9 cm