Hydrofarm Jump Start Seedling Heat Mat - 8.875in x 19.5in - 17 Watt

Hydrofarm Jump Start Seedling Heat Mat - 8.875in x 19.5in 17 Watt - Bottom Heat for Faster Germination

The Hydrofarm Jump Start Seedling Heat Mat delivers consistent, gentle bottom heat to the root zone to accelerate seed germination and improve cutting success rates. Re-engineered with a stronger heating wire and thicker multi-layer construction, this mat provides more uniform heat distribution and greater durability than previous designs. The mat warms the root area 10 to 20 degrees F above ambient temperature - bringing propagation media to the ideal range for faster, more consistent germination. Waterproof construction and a 6ft power cord make it practical for greenhouse benches, basement grow rooms, and indoor propagation setups. UL Listed. Mat dimensions: 8.875in x 19.5in. Output: 17 Watts.

Key Features & Benefits

• +10 to +20 Degrees F Root Zone Heating: Maintains growing media at the temperature range that drives enzyme activity and water uptake during germination - the single biggest variable in germination speed and uniformity.
• Re-Engineered Stronger Heating Wire: Upgraded internal wire construction delivers more uniform heat distribution across the mat surface, eliminating cold spots that cause inconsistent germination across a tray.
• Thicker Multi-Layer Construction: More durable than previous-generation designs - withstands repeated watering cycles, condensation, and the physical wear of a production propagation environment.
• Waterproof Construction: Safe for use under trays that are watered regularly. Sealed construction protects the internal heating element from moisture damage.
• 6ft Power Cord: Long cord gives placement flexibility on propagation benches without requiring an extension cord at most standard bench setups.
• UL Listed: Safety-certified for indoor use - meets UL electrical safety standards for home and commercial growing environments.

Who Should Use This

The Hydrofarm Jump Start Heat Mat is designed for anyone propagating from seed or cuttings indoors - home gardeners, hobbyists, and small-scale producers. It is particularly valuable during cooler months when ambient room temperatures drop below the optimal germination range for warm-season crops like tomatoes, peppers, basil, and cucumbers. The 8.875in x 19.5in size fits under a standard 1020 propagation tray for full-tray germination and cutting propagation setups.

Compatibility

The Hydrofarm Jump Start Seedling Heat Mat is designed for indoor use only. The 8.875in x 19.5in mat is sized to fit under standard 11in x 22in propagation trays. Compatible with standard propagation trays, humidity domes, and plug tray inserts from all major brands. For temperature control, pair with a compatible thermostat controller (sold separately) to dial in a specific root zone temperature rather than relying on ambient-relative heating. Lighting, watering, and planting guidance is printed directly on the mat surface.

Frequently Asked Questions

How much warmer does the mat keep the growing media?

The Jump Start Heat Mat warms the root zone 10 to 20 degrees F above ambient room temperature. Actual temperature increase depends on ambient conditions, tray size, media type, and whether a humidity dome is used.

Do I need a thermostat with this heat mat?

The mat works without a thermostat - it runs at a fixed output. For crops requiring a precise root zone temperature, pair with a compatible thermostat controller (sold separately) to set and maintain an exact target temperature.

Is this mat safe to use with water and condensation?

Yes. The mat features waterproof construction designed for humid propagation environments where regular watering and condensation are expected. Do not submerge the mat or power cord in water.

What is the power draw of this mat?

This mat draws 17 Watts. Designed for standard 120V household outlets and UL Listed for indoor use.