Jump Start Seedling Heat Mat, 48" x 20", 107W

Durable Waterproof Seedling Heat Mat, 48in x 20in

A seedling tray sitting on a cold greenhouse bench germinates slower and less evenly than one held at a steady root-zone temperature, and a mat that can't handle spilled water doesn't last long in that environment. Jump Start Seedling Heat Mats use strong heating wire and thick multi-layer, waterproof construction to warm the root zone 10 to 20 degrees Fahrenheit over ambient temperature, built to withstand rugged greenhouse use.

This 48 x 20 inch mat draws 107 watts and includes a 6 foot power cord, with light, watering, and planting information printed directly on the mat for quick reference at the bench.

Key Features & Benefits

• Increases Seedling & Cutting Success — warms the root zone 10-20°F over ambient temperature.
• Waterproof Construction — built for rugged greenhouse environments.
• UL-Listed with 6 Foot Power Cord — cord included, ready to plug in at the bench.
• 50% Thicker Construction — compared to other brands, for uniform heating and durability.

Who Should Use This Heat Mat

Growers who want a durable, waterproof heat mat to improve germination rates for seedlings and cuttings in a greenhouse environment.

About Jump Start

Jump Start, a Hydrofarm brand, builds propagation equipment including this line of seedling heat mats, engineered with thick multi-layer waterproof construction for repeated greenhouse use across a range of mat sizes.

Frequently Asked Questions

What size mat should I choose?

The 8.875 x 19.5in mat suits a single standard tray, the 20 x 20in mat covers a larger bench section, and the 48 x 20in mat is sized for a full row of trays. Match the mat's footprint to the trays it needs to warm rather than sizing up unnecessarily.

How much does the mat warm the root zone?

It warms the root zone 10 to 20 degrees Fahrenheit over ambient temperature. That range is typical for improving germination without overheating young roots.

Is this mat waterproof?

Yes, it has waterproof, multi-layer construction built for rugged greenhouse use. That's what distinguishes it from a lighter-duty windowsill mat.

Is it UL-listed?

Yes, and it includes a 6 foot power cord. The cord length is meant to reach a nearby outlet without an extension cord at most bench setups.

Can I control the temperature precisely?

The mat itself runs at a fixed output, but it can be paired with the Jump Start Digital Temperature Controller (MTPRTC), sold separately, for precise control. That combination lets growers dial in a specific target temperature instead of relying on the mat's fixed warming range.