Stewarts Large Heated Propagator 52cm

Reliable germination temperatures without a separate heat mat

The Stewarts Large Heated Propagator gives seedlings and cuttings a stable, warm root zone without you having to manage a separate heat mat and thermostat. At 52 x 42 x 28cm it's a generous unit with a sealed heating element built into the base and a crystal-clear rigid cover with adjustable ventilation on top, holding conditions in the ideal 18-23°C range for consistent results.

Key Benefits

• Built-in sealed heater maintaining a growing temperature of 18-23°C, with heat retained inside the propagator.
• Rigid crystal-clear cover for maximum light to young seedlings and cuttings.
• Adjustable ventilation to manage humidity as plants develop.
• Generous 52 x 42 x 28cm footprint for multiple trays or larger seed batches.
• Precise control of growing conditions for seeds and cuttings all year round.

Why do seeds germinate patchily in a cold room?

Cold compost is one of the most common reasons seeds germinate unevenly or cuttings sit without rooting - propagation usually stalls because the root zone is too cool, not because of the seed or cutting itself. A heated base keeps conditions in the right range regardless of ambient room temperature, giving faster, more even results than an unheated propagator.

How to Use

• Fill the base with your growing medium and sow seeds or insert cuttings.
• Fit the clear cover, switch on the heater and let it settle at a steady 18-23°C before relying on it for sensitive seedlings.
• Keep vents mostly closed at first to hold humidity.
• Open the vents gradually as seedlings emerge or cuttings root, then harden off before transplanting.