Jump Start Hot House, Heat Mat, 72-Cell Insert, 7.5 in Dome

Jump Start Hot House — Complete Seed Starting Kit with 7.5 in Dome and Heat Mat

The Hydrofarm Jump Start Hot House is the larger-dome version of the popular Germination Station — featuring a 7.5 in vented dome that provides significantly more vertical clearance than the standard 2 in dome. This makes it ideal for taller seedlings, large cuttings, or crops that develop quickly in height before transplanting. Like the Germination Station, it includes everything needed for a complete indoor seed-starting setup.

The 17W UL-listed 120V heat mat provides gentle, consistent bottom heat — accelerating germination by raising soil temperature 10-20 degrees F above ambient room temperature. Full growing instructions are printed directly on the mat. The 7.5 in dome includes three independently adjustable vents for precise humidity and airflow control throughout the propagation process.

Key Features & Benefits

• 17W UL-listed 120V heat mat — gentle bottom heat raises soil temperature 10-20 degrees F above room temp; instructions printed on the mat.
• 7.5 in vented dome — 7.5 in clearance accommodates taller cuttings and seedlings; three adjustable vents for humidity control.
• 11 x 22 in watertight base tray — no holes; contains drainage without leaks for clean, mess-free propagation.
• 72-cell seedling insert — 72 cells for high-density seed starting; compatible with round and square plugs in the appropriate sizes.
• Complete kit — all components included — heat mat, dome, tray, insert. Just add growing media and seeds.

Who Should Use This Kit

Growers who start seeds and cuttings indoors year-round and need a complete setup with more vertical clearance than a standard 2 in dome — including home gardeners growing tall seedlings such as tomatoes, peppers, or large herbs.

Hot House vs. Germination Station — Which Should You Choose?

The primary difference between the Hot House (CK64060) and the Germination Station (CK64050) is dome height — 7.5 in vs. 2 in. If you primarily start small seeds that will be transplanted before reaching 2 in in height, the standard Germination Station is sufficient. If you start taller seedlings, large cuttings, or crops with rapid early-stage growth, the Hot House dome provides the clearance they need without bending or breaking against the dome lid. Both kits include the same heat mat, tray, and 72-cell insert.

Frequently Asked Questions

What is included in the Hot House kit?

The CK64060 includes: one 17W UL-listed 120V heat mat, one 7.5 in vented humidity dome with three adjustable vents, one 11 x 22 in watertight base tray, and one 72-cell seedling insert. Growing media and seeds are not included.

How is this different from the Germination Station (CK64050)?

The primary difference is dome height — the Hot House dome is 7.5 in tall vs. 2 in on the Germination Station. The Hot House accommodates taller seedlings and cuttings. Both include the same 17W heat mat, watertight tray, and 72-cell insert.

What does the heat mat do?

The 17W heat mat provides gentle bottom heat that raises soil temperature approximately 10-20 degrees F above ambient room temperature — improving germination speed and rates for most seed types, especially warm-season crops.

Is the heat mat safe?

Yes. The heat mat is UL-listed and waterproof, meeting safety standards for residential and commercial use. Full growing instructions are printed on the mat.

Can I buy replacement parts separately?

Yes. The dome, heat mat, tray, and insert are available individually from Hydrofarm, so worn components can be replaced without purchasing a complete new kit.