Even though the unit is compact, it still clearly displays humidity and temperature readings. On top of showing the current data, it also shows ‘low’ and ‘high’ readings from the last 24 hours, and indicates whether the humidity is considered ‘dry’, ‘comfortable’ or ‘wet’. It will also depend on what kind of plants you want to grow, as different plants will favour more or less ventilation. Tropical plants, for example, will enjoy high humidity, while alpines enjoy a good stiff breeze. It’s robust in its simplicity, and its green ABS plastic case has a water and dust resistance rating of IP65 – this makes it suitable for use outside in the greenhouse as well as indoors. IP65 is considered both dust tight and protected from ‘low pressure jets’; as result, it should stand up against humidity, rain and even the odd accidental splash from the hose. Paraffin heaters are useful if your greenhouse is out of the way, without access to the electric grid. Electricity

Unlike some of the units featured on this list, this Brannan thermometer doesn’t measure humidity, but it does still display the maximum and minimum temperatures. These are easy to read, displayed in numbers that are the same size as those displaying the current temperature. Resetting the max and min temperatures needs to be done manually, using a small button on the side of the unit. Finding a good heater for your greenhouse may seem like a complicated process. What you need to remember is that the size of your greenhouse will determine the amount of power that you use. It is better if you find those that produce carbon dioxide because it will benefit your plants. The amount of power you use will affect your monthly bill so choose wisely. Buying a heater for your greenhouse is not quite as simple as it first seems. It’s not that the heaters themselves are complicated, it’s that you need to put quite a lot of thought, planning and even some basic maths into your decision. But don’t worry, this Buyer’s Guide explains the basics of all of this. SizeDue to its compact design, this heater is extremely versatile. It’s one of the best heaters if you want something portable that can be used in a lot of different contexts. Seeing as it doesn’t rely on a mains power supply, it can also be used when camping or sitting out on the patio. Maintaining the perfect climate in your greenhouse is crucial for the health and productivity of your plants. Whether you're a seasoned gardener or just starting out with your own greenhouse, our collection of Greenhouse Thermostats is here to help you create the ideal growing environment. The LightHouse Eco Heat Greenhouse Heater is perfect for using more like a frost protection heater to keep the temperature a little above freezing, which is ideal for tender plants and seedlings in the winter

One last feature I really like is that it has a thin cable with a temperature sensor on the end. I like this because I can place it near my plants and I actually prefer to place mine into a small pot of compost at the same level as my plants so I am able to maintain a precise soil temperature to give an even more accurate temperature reading where the heat is needed most. Image: Rhino greenhouse without blinds (left) showing autovent open; Rhino greenhouse with blinds (right) showing autovent open without obstruction from blinds. They’re a good option for keeping temperatures just above 0°C, but you can’t expect much more from them – especially if it’s very cold out. They have quite a low heat output overall, but it’s sufficient to stop greenhouse plants getting affected by frost. Energy Efficiency and Running CostsVersatile Climate Control: Whether you need to maintain the perfect temperature, ventilate your greenhouse, or even cool it down during hot spells, THERMO2 has you covered. This thermostat is compatible with various climate control systems, making it the ideal controller for all your greenhouse needs. Ensuring your plants have enough space between them allows for proper air circulation. It’s crucial in your battle against condensation. Moisture can get trapped if plants are too close together, which increases the chances of condensation forming in your greenhouse. Putting any kind of heater inside an environment designed to have moist, humid air, a working irrigation system and organic matter needs some safety considerations. Please read carefully the safety instructions that come with any heater and any other garden appliance you have in the greenhouse. Keep out kids and pets and be careful when you’re pottering around in there yourself. Our greenhouse thermostat collection comes from leading brands such as J&D Manufacturing, Dramm, BioGreen and Emerson. All cables, temperature probes and other hardware are included for installation, and we have weatherproof thermostats for greenhouses that use sprinklers and misters. You'll find thermostats that work with 12-volt or 24-volt wiring.

This greenhouse heater has a paraffin tank with a capacity of 4.5 L. It requires a funnel (not included) to help with the fuelling process. As mentioned, this is enough paraffin to keep the heater going for approximately three days. Good design features give the product better functionality and more durability. We’ll be comparing the probe length, the screen design, and any other design feature that helps contribute to the product’s quality. The WILLHI If your aim is simply to keep temperatures above 0 °C, consider a low-power electric tubular heater . The purpose of these is to keep frost out. They have around 40 W of power and provide some warmth without hiking up your energy bill. Being able to control the overall humidity in your greenhouse is an essential part of the growing process; if the humidity is too high, it can interfere with plant transpiration, which inevitably slows down plant growth. On the other hand, if humidity is too low, it can accelerate transpiration to levels the roots can’t keep up with, leaving plants dry and wilted. Gas heating in a greenhouse it generally considered to be a relatively cheap option. Using a gas heater can keep costs down because you know exactly how much money you have spent on fuel before it even starts heating. Gas greenhouse heaters are like one of those pay-as-you-go electricity meters – you’ll be aware of all costs for running the heater up front.The unit provides 2KW of output which is about right for most small greenhouses.Since the unit is well built, you can expect manyyears of service from it if you look after it well, including having it regularly serviced. As we said before, heaters that are used in moisture-rich environments need to be waterproof or at least splash-proof. The Botanico Greenhouse Heater is water-resistant with the specifications of IPX4 stated in its credentials. This shows you that it is safe to use in moist environments but not in the direct line of water streams. The unit can be depended upon to provide adequate heat without moisture build-up inside the unit. Compared to the small Brannan Greenhouse Thermometer, the ThermoPro TP50 is capable of measuring a much larger range of temperatures, from -50°C to 70°C, and it can display its readings in either Celsius of Fahrenheit. Upgrade your greenhouse's climate control system with the advanced Greenhouse Thermostat "THERMO2." This digital thermostat takes your gardening and cultivation to a whole new level by saving energy and providing precise control over your greenhouse environment. Paraffin greenhouse heaters like the Bio Green Warmax Power 5 Heater have been popular amongst gardeners for a long time. It’s easy to see why, given that this model is efficient, easy to use and practical.

Sometimes, all you need is a basic, water-resistant thermometer like this Brannan Digital Max Min Greenhouse Thermometer . It doesn’t overcomplicate things, simply displaying the current temperature, as well as the maximum and minimum.Due to the small size of greenhouse heaters in general, butane/propane heaters will likely only be able to carry a small gas canister. As a result, they do not tend to burn for as long as paraffin heaters. Explore our Greenhouse Thermostat collection below to find the perfect solution for your greenhouse. Whether you need a basic thermostat or a more advanced model with smart capabilities, we have options to suit your needs and budget. In terms of construction, it’s a robust unit overall, with a stainless-steel body and plastic handle. Plus, it has a water-resistance rating of IPX4, meaning that it this Bio Green heater will be protected from splashing washer (great news for anyone with a tendency to slop the ol’ watering can around!).