Jump Start 72-Cell Germination Station with Heat Mat, Tray and 2" Dome

The primary difference is dome height. The Germination Station uses a 2" low-profile dome, making it ideal for compact shelf setups and situations where vertical clearance is limited. The Hot House with the 7.5" dome provides more headroom for taller seedlings and better humidity retention over a longer grow-out period before transplant. Both kits include the same 17W heat mat, 72-cell insert, and watertight tray.

The 17W heat mat is designed to raise root-zone temperature approximately 10°F–20°F above ambient room temperature. This range is recognized as optimal for triggering germination in most vegetable, herb, and flower seeds. For precise thermal management, this mat is compatible with the Jump Start Digital Temperature Controller.

Yes. The heat mat is UL-listed and waterproof, built for continuous operation throughout the germination phase without risk of overheating or root damage. Most growers run it around the clock until seeds have sprouted, then remove the dome and reduce heat as seedlings establish.

The 72-cell insert works with most standard propagation media including peat pellets, starter plugs, rockwool cubes, and premixed seed-starting soil. Growing media and plugs are not included and are sold separately — choose whichever medium suits your preferred cultivation method.

The watertight base tray supports bottom-watering — simply pour water directly into the tray and let the cells absorb moisture upward through capillary action. This method reduces the risk of damping off, keeps foliage dry, and encourages roots to grow downward toward the moisture source.

Once the majority of seeds have germinated and seedlings are visible, begin opening the dome vent to gradually lower humidity and introduce more airflow. Remove the dome entirely once seedlings are well established — typically within a few days of sprouting — to prevent excess moisture buildup and harden off young plants before transplant.