grow your own happiness.
the garden centre for people without a garden.
Spider Farmer Seedling Heat Mat Kit with Thermostat, 2 Sizes
10" x 20.75"
£39.00
Skip to product information
Spider Farmer Seedling Heat Mat Kit with Thermostat, 2 Sizes
£39.00
The Spider Farmer Heat Mat Kit is a heated propagation mat with thermostat control: a far-infrared mat that warms the root zone 10 to 25°C above room temperature in about two minutes, with a digital controller you can set from 5 to 42°C.
A row of seed trays on a shelf in a cool spare room, and a quiet controller holding the compost at exactly the warmth your seeds love. It’s the difference between waiting weeks and seeing shoots in days.
A heated propagation mat with thermostat control
Warm roots are happy roots. Far-infrared film spreads gentle, even heat across the mat, so every cell in the tray gets the same cosy start, and the thermostat holds it steady day and night.
It’s lovely for patient little gardeners: sow a tray together, set the temperature, and make a chart of how many days each variety takes to appear.
What your heat mat kit helps with
- Speeding up germination of tomatoes, chillies and herbs
- Rooting cuttings of favourite houseplants
- Sowing early on cool windowsills and shelves
- Keeping trays steady in a chilly spare room or greenhouse
- Extending your growing season at both ends
Quick, even warmth with precise control
- Warms up fast. Raises the root zone 10 to 25°C above ambient in about two minutes.
- Thermostat included. Set from 5 to 42°C, with a 0 to 60°C display.
- Even heat. Far-infrared film with over 90% energy conversion efficiency.
- Waterproof. IP67 rated, flexible and easy to wipe clean.
- Two sizes. One-tray or shelf-length (see table).
Propagation heat mats: your questions answered
Which size do I need?
The 10 × 20.75 inch mat fits one standard seed tray. The 48 × 20.75 inch mat warms several trays along a shelf.
What temperature should I set?
Around 20 to 25°C suits most vegetable and herb seeds; chillies and peppers like it a little warmer.
How fast does it heat up?
The mat starts warming the root zone within about two minutes.
Can I use it under a propagator?
Yes. Lay the mat flat, put the propagator or tray on top and place the thermostat probe in the compost.
The details
| Type | Far-infrared seedling heat mat with digital thermostat |
|---|---|
| Sizes | 2 (see table) |
| Temperature boost | 10–25°C above ambient |
| Control range | 5–42°C |
| Display range | 0–60°C |
| Waterproof | IP67 |
| Efficiency | Over 90% energy conversion |
| Brand | Spider Farmer |
Sizes and measurements
| Size | Mat size | Power |
|---|---|---|
| 10 × 20.75 inch | 25.4 × 52.7 cm | 20W |
| 48 × 20.75 inch | 121.9 × 52.7 cm | 108W |
In the box
1 × Spider Farmer heat mat in your chosen size and 1 × digital thermostat controller.
Gentle warmth, exact control, and a windowsill full of new beginnings.