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The Stewart Electric Propagator is key to year-round seed germination and cuttings success. Its heated base provides constant bottom heat (15°C–20°C above ambient) and adjustable ventilation ensures ideal humidity for strong rooting in your grow room.
Ensure perfect growth conditions for your seedlings and cuttings all year round with the Stewart Electric Propagator. This essential propagation equipment creates a consistently warm and humid microclimate, vital for successful seed germination and rooting, especially during the colder months.
The sealed heating unit and clear, durable lid work together to raise the compost temperature by a steady 15°C to 20°C above the ambient air, protecting developing plants from draughts and ensuring a strong start in life.
Key Benefits of the Stewart Electric Propagator
- Accelerated Germination: The constant, gentle bottom heat from the sealed base unit dramatically speeds up seed sprouting and encourages faster, stronger root development in cuttings.
- Ideal Climate Control: The crystal-clear, impact-resistant cover traps essential moisture, while adjustable ventilation panels allow you to easily regulate humidity and air circulation, preventing damping-off.
- Energy Efficient Operation: Utilises a long-life, low-wattage heater (8W for Medium, 22W for Large) that is economical to run, even over long periods.
- Year-Round Propagation: Extends your growing season, allowing you to sow tender, heat-loving plants (like chillies and tomatoes) much earlier in the year.
- Durable and Reusable: Built from high-quality plastic with a long-life base tray and a clear cover for maximum light transmission, ensuring use season after season.
Available in two practical sizes to fit any grow room or greenhouse bench:
- Medium (38cm x 24cm x 21.5cm): Ideal for smaller batches and windowsill placement. Features an economical 8-watt heater.
- Large (52cm x 41.5cm x 28cm): Provides ample space for multiple seed trays or pots. Features a 22-watt heated base for reliable warmth.
Please note: Propagator only, does not come with plants.
Need help on how to take cuttings? Take a look at our blog post: The Art of Propagation: How to Take Cuttings Like a Hydroponics Pro for a step-by-step guide.
Frequently Asked Questions
How warm does the Stewart Electric Propagator get?
The non-thermostatic Stewart Essential models typically maintain a compost temperature that is 15°C to 20°C above the ambient room temperature (in a normal environment). This provides the optimum warmth (around 18°C to 20°C) needed for most seed germination without the risk of the soil getting too cold.Do I need to add water to the base of the propagator?
No, the Stewart Electric Propagator does not require water in the base. It is a sealed heating unit designed to warm the air and the compost from below. You should only water the soil or medium directly to keep it moist, but not saturated, as this can lead to seeds rotting.Why is there condensation inside the propagator? Is that a problem?
Condensation is normal and is a good sign that the propagator is maintaining the high humidity necessary for seedlings and cuttings to establish. Excessive condensation, however, can promote mould or disease. If this occurs, slightly open the adjustable vents on the lid to increase air flow and reduce the humidity level.When should I take my seedlings out of the heated propagator?
Once the seeds have successfully germinated and the seedlings have fully emerged, they should be removed from the direct heat source within a few days to prevent them from becoming weak or "leggy" (stretched). Move them to a cooler, well-lit area with high light levels to encourage strong, stocky growth.SKU: 1311Free delivery on orders over £60*
- UK Mainland onlyStandard Delivery £4.95
- Heavy / Large item surcharge £2 per item
- 1-3 Days**
- UK Mainland onlyExpress Delivery £8.95*
- Next Working Day**
- UK Mainland onlyScottish Highlands £15.95*
- 2-5 Days***Can not be used with Heavy / Large items
**If ordered on a working day before 2pm cut off (Saturday and Sunday are not classed as working days).Please See Delivery and Returns page for more details.