In this guide we’ll take a look at the best heated electric propagators for your windowsill.
I’ve compared design, size, energy efficiency and cost
to give you my top recommendations.
What Is The Best Electric Propagator?
More Detailed Electric Propagator Reviews
This is a sturdy and attractive heated propagator that fits nicely on a windowsill. The kit consists of an attractive green and white tray made of durable and rigid plastic. On top of this sits seven individual cells which again are made from durable green and white plastic topped with clear, flexible, shatter resistant lids with adjustable vent openings.
The overall size of the propagator is 76cm long by 18.5cm wide by 15cm high. It comes with a lead and plug. The lead is slightly on the short side, however, this is easily fixed with an extension lead.
The propagator features a 13W carbon fibre heating element that evenly distributes heat across the base. The separate pods allow you to grow a range of different seedlings at a time, and you can easily remove the pods from the heated base once they have germinated to prevent leggy growth. The separate pods also allow you to ventilate different varieties as required.
This is a really nice-looking propagator that is practical and versatile. It is well made and durable and offers excellent value for money.
This is a large propagator with a nice tall lid that allows you to grow larger plants and cuttings with ease. The set consists of a simple heated tray with a ventilated plastic lid. While the materials are not as sturdy as the previous product, with care they should last.
The simple design makes this a versatile propagator as you can use whatever size trays and pots you require. The base will hold pots up to one litre in size and the overall dimensions of the unit are 52 x 42.5 x 28 cm. The unit has a 22W heater to maintain a nice even temperature during the germination process. There are also two adjustable vents in the roof.
This is a versatile and reasonably priced product that will allow you to grow a range of seeds and cuttings.
This propagator comes with a base with a heating element, a moisture mat and one large and two small seed trays. You also receive 5x 9cm flower pots which can be used instead of the trays. You could also use other small pots in the base if you wish.
The unit is made of reasonably sturdy plastic and the clear plastic lid has two adjustable air vents. The height of this product will allow for some growth and it would also be roomy enough for small cuttings. The moisture mat helps keep the humidity in the unit higher and means less watering is required and your precious seedlings are less likely to dry out.
The base has and 18-watt element to provide base warmth and the vented lid allows you to control heat and humidity. The overall size of the unit is 26cm x 42cm x 52cm and the unit is supplied with a 3-metre cable and 13 amp fitted plug.
This propagator is roomy and versatile and the addition of the capillary moisture mat means there is less chance of seedlings drying out.
Electric Propagator Buying Guide
Heated propagators all work on the same principle. They create an ambient warmth that is just a few degrees above the air temperature and this helps certain seeds germinate. They are all cost effective, costing just a few pennies a day to run, and you often only need them for a few weeks of the year.
Heated propagators come in a range of sizes. I like the ones that are designed to fit on a windowsill as this is space saving, convenient and allows the seedlings to get enough light. However, you will want to choose one that makes the most of the space you have available.
The propagator you choose will also depend on what you want to grow. Some come with small trays or pots and some just allow you to put your own pots and trays inside. Some are taller than others and these would be more suitable if you wanted to use your propagator for cuttings.
What types of seeds require heat to germinate?
Most seeds germinate more effectively with some base heat. However, a heated propagator is particularly useful for plants that are usually grown in warmer climates as these generally need warmer temperatures to germinate. If you are planning to grow tomatoes, chillies, peppers, aubergines, cucumber or melons then a heated propagator will be a worthwhile investment. Heated propagators are also useful for seeds which require a long growing season as they enable you to get a head start and make the most of warm summer days.
How do I use my new heated propagator?
A heated propagator is very simple to use. Once you have planted your seeds in their trays or pots and watered them, simply put them in and turn it on. You will probably not notice a great deal of warmth in the unit, however, you will see some condensation that will show you the unit is doing its job. If your unit has a capillary mat, then wet this under the tap and put it at in the base before putting your seeds in.
You can adjust the ventilation in your propagator as necessary but bear in mind that the unit will dry out more quickly when the vents are open. Once the seeds have germinated and are beginning to grow, you can either remove them from the propagator or just unplug the unit if all the seeds have germinated. You can also increase the ventilation at this stage to gradually acclimatize the seedlings.