A propagator (sometimes called a seed tray with a dome or a propagation box) is an essential tool for beginners and experienced growers alike who want reliable seed germination or want to take cuttings. It creates a controlled environment with ideal conditions for young plants.
What is a propagator?
A propagator is a tray with a clear lid that creates a microclimate for young plants. That microclimate helps you keep temperature and humidity at the right level, which is crucial for germinating seeds and rooting cuttings. You'll find many types of propagators, from simple unheated models to advanced versions with built-in heating and ventilation.
Benefits of using a propagator
- Faster germination: in a stable, warm environment, seeds sprout faster and more evenly.
- Protection from outside influences: a propagator shields young plants from temperature swings, draughts and pests, which matters most in the earliest growth stage.
- Humidity control: many propagators have vents, so you can adjust humidity to suit your plants.
Types of propagators
When choosing a propagator, think about what the plants you want to grow actually need. At GrowDealz you'll find a range of propagators for different purposes.
Unheated propagators
These simple propagators are perfect for germinating seeds and rooting cuttings at room temperature. They usually consist of a plastic tray with a clear lid and, in some cases, adjustable vents.
Example: the Propagator ECO Complete 58x37cm is a great pick if you're a hobby grower looking for a reliable, affordable propagator.
Heated propagators
If your plants need higher temperatures, or you grow in a cooler room, a heated propagator is the way to go. A built-in heating element keeps the temperature constant, which encourages germination and root development.
Need more space? The Propagator PRO 70 Complete 58x37x24cm has a tall lid that gives several plants plenty of room, while its adjustable vents help keep the microclimate stable.
Tips for using a propagator
- Placement: put your propagator somewhere bright, but out of direct sunlight to prevent overheating.
- Temperature: for most plants, keep the temperature inside the propagator between 18 and 24 °C.
- Humidity: use the vents to reduce condensation and prevent mould.
- Watering: keep the growing medium moist but not soggy to avoid root rot.
- Air circulation: lift the lid now and then to let in fresh air and help your seedlings get used to the conditions outside the propagator.
A successful harvest starts with the right propagator
A propagator is a worthwhile investment for anyone who wants to grow plants successfully. Thanks to the controlled environment, seeds germinate faster and cuttings root more effectively, giving you healthier, stronger plants. With the right propagator and the tips above, you're well on your way to a thriving garden.
Looking for a wide choice of propagators, pots and other growing supplies? GrowDealz has you covered, whether you're just starting out or have years of experience.

