Ryset Heat Mat 500mm x 250mm – Seedling & Propagation Heat Mat

Give seeds, seedlings and cuttings a warmer, more reliable start with the Ryset Heat Mat 500mm x 250mm.

Bottom heat can make a big difference during propagation, especially through cooler months when soil and propagation mix temperatures can slow germination and root development. This 18W heat mat gently warms the root zone by sitting underneath your seed trays, propagation unit or seedling containers, helping create better conditions for germination and cutting success.

Designed for simple use, place the heat mat on a flat, dry surface, position your propagation tray or seedling setup on top, and allow the mat to provide steady warmth to the base of the growing medium.

This size fits neatly under the Ryset GDP230 Propagator Unit, making it a great companion product for gardeners wanting a cleaner, more controlled seed raising or cutting setup.

Features

• 500mm x 250mm propagation heat mat

• 18W power output

• Provides gentle bottom heat to the root zone

• Helps improve seed germination and cutting success

• Warms the root area above room temperature

• Great for winter seed raising and cooler growing conditions

• Water-resistant construction

• Simple plug-in operation

• Designed to sit under seed trays, seedlings or propagation units

• Fits under the Ryset GDP230 Propagator Unit

Why Use a Heat Mat?

Seeds and cuttings often respond better when the propagation medium is kept warmer than the surrounding air. In cooler weather, the air temperature may seem fine, but the soil or mix can remain too cold for strong germination or root growth.

A heat mat provides warmth from below, helping create a more consistent environment for seeds and cuttings to get started. This can be especially useful for gardeners raising plants through winter, starting spring crops early, or propagating plants that prefer warmer root conditions.

Perfect For

• Seed raising

• Seedlings

• Cuttings

• Propagation stations

• Propagation trays

• Humidity domes

• Mini greenhouses

• Winter growing setups

• Starting spring crops early

• Indoor plant propagation

• Flower seeds and vegetable seeds

How To Use

Place the heat mat on a flat, dry surface. Position your seed tray, propagation unit or container on top of the mat. For better temperature control, use with a compatible thermostat and temperature probe, especially if you are growing more temperature-sensitive seeds or cuttings.

Avoid placing the mat directly in water or using it on uneven surfaces.

Product Details

Brand: Ryset
Product Code: GDP234
Size: 500mm long x 250mm wide
Power: 18W
Use: Bottom heat for propagation, seed raising, seedlings and cuttings
Construction: High-quality, water-resistant design
Compatible With: Ryset GDP230 Propagator Unit

FAQ

What is the Ryset Heat Mat used for?
It is used to provide bottom heat for seeds, seedlings and cuttings, helping create warmer conditions for germination and propagation.

What size is the heat mat?
The mat measures 500mm long x 250mm wide.

How powerful is it?
This heat mat is 18W.

Does it fit the Ryset propagator?
Yes, it fits under the Ryset GDP230 Propagator Unit.

Can it help seeds germinate faster?
Yes, bottom warmth can help improve germination speed and consistency for many seeds, especially in cooler weather.

Can I use it for cuttings?
Yes, it is suitable for cuttings where gentle warmth around the root zone may help support root development.

Should I use a thermostat with it?
A thermostat is recommended if you want more precise temperature control or are working with temperature-sensitive seeds, cuttings or seedlings.

Is it waterproof?
It has a water-resistant construction, but it should not be submerged or placed directly in standing water.

Where should I place the heat mat?
Place it on a flat, dry surface underneath your seed tray, propagation unit or seedling container.