Should I heat my vegetable greenhouse?
Many gardeners have inquired, “Does my veggie greenhouse need to be heated?” If you don’t, read this article to see why! Here are some suggestions:
Heat exchangers from the ground to the air
A ground to air heat exchanger (GAHT) improves the heating and cooling system in your greenhouse. You can use a GAHT to seal the greenhouse during the late fall season to minimize cold shock. Alternatively, you can enrich the air within the greenhouse with CO2. The end outcome will be the same regardless of which strategy you use: a warmer vegetable greenhouse and more ripe fruit.
The thermal mass in the soil is used by a ground to air heat exchanger. The technology heats the greenhouse air and transmits it to the soil. It can also be used to dehumidify the greenhouse. It functions by circulating air through underground pipes. As hot air runs through the pipes, it provides heat to the soil, and as it cools, it returns to the greenhouse and re-absorbs moisture.
When erecting a GAHT, ensure that the soil beneath it has the same footprint as the greenhouse. A 12×24-foot footprint is suitable for an earth to air heat exchanger, but dig deep enough to assure adequate soil to air heat exchange. Then, be sure to place the system in a sunny location. You can start bringing in your plants once it is in place.
A GAHT system contributes to higher indoor CO2 levels. Many growers add CO2 to their greenhouses to promote healthy development. A GAHT system can assist you in taking advantage of the greenhouse effect by storing this energy underground and using it to heat the soil during the colder months. A GAHT system can also help you save money on greenhouse CO2 emissions. This is a win-win situation for vegetable greenhouse owners and will boost the value of your greenhouse.
Heaters powered by propane
If you are an avid gardener or are just getting started with greenhouse gardening, you understand how tough it can be to create a quality harvest. Fortunately, propane may be a very useful tool in your gardening efforts. If you reside in a cold climate, propane is an excellent choice for greenhouse heating. Here are some pointers for putting in a propane heater. After determining which heater will best suit your needs, you must locate a location for the tank and connect the propane pipes.
If you have a plastic greenhouse, an air supply may be required to ensure optimum combustion. A simple calculation can assist you in determining the quantity of air intake required for your greenhouse heating unit. Divide 50 square inches by 1.6 to determine the size of the air intake. This results in an air intake area of 80 square inches. Make sure the exhaust pipe is at least 2 feet above the greenhouse’s ridge. Maintaining the exhaust pipe at a height above the ridge will aid in the removal of pollutants and the maintenance of the greenhouse’s temperature.
Another consideration when utilizing gas or kerosene heaters is the risk of fire. You might not realize it, but the fumes emitted by these heaters are hazardous to plants. Propane heater exhaust should be ventilated so that it does not come into touch with combustible items. Also, before the heating season begins, test the main heating system.
Vegetable greenhouse heating system
Electric space heaters
Electric room heaters are a fantastic alternative for a vegetable greenhouse since they prevent freezing and reduce crop damage. They’re simple to put up and include a thermostat that can be adjusted to match the temperature of your vegetable greenhouse. You may even use them in fan-only mode to circulate warm air around your plants without burning them. These units are also resistant to water splashes and include an IPX4 housing that protects electronics from moisture. If they become substantially wet, the thermostat shuts down automatically, preventing overheating.
Electric and gas-powered room heaters are available. Electric units require their own outlet and should not be used with an extension cord. Because gas-powered models are more powerful and produce a lot of heat, they are typically situated well away from the plants. You should also think about the type of greenhouse you have, as structure and height might have an impact on heat retention. A greenhouse with a high roof will retain more heat.
The Palma Heater is a strong, dependable heater that includes a fan to circulate air around the greenhouse. The Palma Heater, with its adjustable thermostat, is a great choice for greenhouses up to 8×12 feet in size. Consider a more powerful model for larger greenhouses. If you are unsure about your greenhouse’s heating requirements, a fan-only model is an option.
An electric room heater is the most efficient way to warm a vegetable greenhouse. Because it only requires power and an extension cord, an electric room heater will be more effective than alternative heating techniques. This method takes no time to set up, although it may be more expensive than the former. However, it is the simplest choice and needs the least amount of effort on your behalf. It is critical to remember that an electric room heater should be positioned in a stable area with adequate ventilation.
Mats for germination
A germination mat promotes germination by raising soil temperature. Because garden soil includes toxins, it is best to use a soilless potting media such as peat moss, perlite, coconut coir, or a combination of these materials. It is also critical to maintain the area around the bulb dry, as this might cause the soil to overheat. Remove the seedlings from the heat mat once they have sprouted.
A heat pad slowly heats the soil around the seeds, indicating that it is time for them to germinate. Temperatures should be maintained at or near 80 degrees Fahrenheit. The growing media should be kept moist but not wet. Remove the heat pad and place the seedlings under a greenhouse dome once the majority of the seeds have sprouted. For most veggies, germination should be complete by day 10.
If seedlings are started indoors, they will be able to control the temperature of the room as well as the temperature of the propagation trays. They will only require a heat mat if nightly temperatures fall below 70 degrees. However, peppers and tomatoes require a higher temperature. They may not be suited for use in vegetable greenhouses for these reasons. This is why germination mats are not the ideal choice for vegetable greenhouses.
If you intend to utilize propagation mats throughout the greenhouse, make sure you have the appropriate size. A 10″ x 20″ mat for a single tray or a 32-cell pot with insert pots are available. If you’re utilizing multiple trays, you can use a larger mat in a smaller space. These mats can be purchased at Walmart or Amazon.
Compost
If you’re growing veggies, you might be wondering, “Do I need to heat my vegetable greenhouse?” The response is emphatically “no.” However, there are a few options. Compost is an excellent strategy to keep the greenhouse temperature stable while also producing nutrient-rich soil in the spring. Compost is most beneficial when placed in the greenhouse’s core, radiating heat outward. Just keep the compost out of reach of mice. If you can’t find a thermometer, place a pallet over the compost pile to enable air to flow.
It is critical to evaluate the type of crops you will be producing while deciding whether or not to heat your greenhouse. Some vegetables are cold hardy and can be produced without the use of supplemental heat. Others require heat to thrive during the coldest months of the year. Whatever you chose, make sure to plan ahead of time and select the best heating system for your area. Once you’ve established the greatest greenhouse setup for your crops, you’ll be well on your way to profiting from your plants!
Old Christmas lights or soil warming cables are another option for warming your greenhouse. These bulbs emit heat even when temperatures decrease significantly, making them an excellent choice for keeping your greenhouse warm without using power. You can also utilize waterproof soil warming cables that are buried in the ground. Just make sure the cables are placed low enough so that they do not touch the plants. Also, check the temperature of your greenhouse every night before going to bed. If the temperature is too low, you may need to switch on an additional light to keep yourself warm.
Finally, you can employ a composting system. Because decaying materials generate heat, you can utilize the compost heap to heat water or soil. Another option is to install a ground to air heat exchanger, which may be buried beneath the greenhouse and allows you to use sunshine inside the greenhouse. The compost will absorb the heat from the sun. If you intend to use a composting system, make sure to turn it on a regular basis so that it can degrade correctly.
Elife vegetable greenhouse