Sprout. + Heat Pack Seed Germination Kit

A Precision Kit for Faster, More Reliable Germination

Paper towels dry out. Plastic bags trap stagnant air. Heat mats warm a wide area at a fixed, imprecise temperature. Most seed germination methods rely on conditions you can't actually control.

The Sprout. + Heat Pack. Kit is built differently. Heat Pack. delivers adjustable, targeted warmth from 20°C to 35°C in 1°C increments. Sprout.'s EU food-grade silicone insulates that warmth into a sealed chamber, with airflow grooves that maintain oxygen exchange and a magnetic lid for easy inspection.

The result is a stable, repeatable microenvironment — the kind serious growers have always needed and home growers rarely had access to.

The Three Variables That Decide Germination

Every seed needs three things to germinate successfully. Get them right and germination is fast and consistent. Get any of them wrong and seeds fail or develop weakly.

1. Temperature Most seeds have a narrow optimal range — typically 24–28°C for warm-season varieties. Heat Pack. holds your chosen temperature within a 1°C band.

2. Moisture Sprout.'s sealed silicone chamber retains humidity around the seed without flooding it. Lift the lid to check, snap it back on — the microclimate stays intact.

3. Oxygen Seeds breathe during germination. Sprout.'s signature airflow grooves on the lid allow gentle passive ventilation, preventing the stagnation that causes mould and rot in plastic-bag methods.

Together, this kit gives you control over all three at once.

What's in the Kit

• 1 × Sprout. silicone germination pod (your choice of Black Lid or Orange Lid, both with Black Body)
• 1 × Heat Pack. USB-C powered thermal heater (20–35°C adjustable)
• 1 × USB-C cable
• 1 × Allen key (for temperature adjustment) — pending supplier confirmation
• Instruction manuals

You'll also need: a USB-C wall adapter (5V minimum 1.5A; 20W or higher recommended). Most modern phone chargers work.

How It Works

1. Slide the Sprout. silicone skin over Heat Pack.
2. Plug Heat Pack. into a USB-C adapter
3. Set your target temperature (Allen key supplied)
4. Place your seed inside the pod with your chosen germination medium
5. Close the magnetic lid — airflow grooves vent gently while the chamber holds heat and moisture
6. Lift the lid to inspect; the magnetic seal makes it effortless
7. Once the taproot emerges, transplant into your preferred growing medium