Does a Heater in a Greenhouse Dry Out the Plants?

Have you ever tried putting any object directly over a fire and wait to see what happens next?

Anyone can assume the ultimate result, which is the drying-up and shrinking of that material. The reason behind that is the loss of water and moisture content from that component, leading to its burning and brittle condition.

The same thing can also occur through a heater, probably not to you, but definitely to the plants, you are cherishing inside a greenhouse.

So, while selecting a heater, always be the picky one or otherwise become ready for your biggest nightmare.

Yes, as you are thinking, today’s topic is about a greenhouse heater that can save and also destroy your plants inside the workplace.

Does Greenhouse Heater Dry out the Plants?

The type of question that you are approaching doesn’t have any direct answer fur to several reasons. One of such reasons is the impact of various other actors and the type of heat you provide to your greenhouse.

So, the answer can be yes and no at the same time. That is to say, the first and foremost thing on which it depends is the type of heater you are using. You cannot ever go for any random sort of heater or such heating system used for you and your house.

The number one reasoning behind this is that you and your plants are never the same things! The requirements of plants in a greenhouse system are entirely different from what you want in your home.

So, you cannot take a heating system from your home and adjust it to your greenhouse by expecting a good amount of yield. Here are few features that need to be considered before taking any heating related decisions:

  • While doing this with the motive of saving some money, you may end up meeting more losses by killing out your plants because the other name of dried-up plants is nothing but having them killed.
  • To understand more about the heating system and drying of the plants, you need to know those things that cause your plants to dry.
  • Plants dry out the most when they lack humidity and moisture. That also can directly be regarded as the shortage of water supply. However, need in water doesn’t always mean that the store is less than the demand. That is to say, the problem with the water is not always linked with the water supply but can also occur due to other reasons like excessive heat.
  • If the heat from the heaters is uncontrollable and too much, then the greenhouse gives up an excessive amount of humidity and moisture out. As a result, the lack of water starts to apprise, which becomes an ultimate reason for your greenhouse plants to dry out.
  • An uncertified greenhouse heater may fail to control various necessary factors that make the greenhouse habitable for the plants. That is to say, maintaining a higher temperature during cold days is not only the sole task of a conservatory. Maintaining a higher temperature is only needed for a limited short period throughout the whole year.

There are various other necessary factors that a greenhouse needs to regulate for the survival of plants. Various such factors sometimes get interrupted due to different unfit heaters. For example- sometimes a heater can raise the temperature way above the tolerance level of the plants that turn out the plants to dry.

Besides the inability to control the temperature, some heaters also supply an excess flow of air. Plants not only fry due to excess heat but can also go the same in case of too much air. Plants that remain in the direct route of air supply are more reasonable with drying up.

Drying of the plants also occurs when the heaters solely remain busy only heating the greenhouse without spotting the moisture level content in the greenhouse atmosphere.

Again, fitting an unspecialized greenhouse heater, dry out your plants as they are not adjusted according to the greenhouse’s size, shape, and volume. In terms of any heater, the calculation of BTUs comes in the first place. According to BTUs, the heater’s capacity should match the power of the heat that a greenhouse can tolerate.

This capability is maintained when the heating capacity of the heater per hour is adjusted according to the spacing and insulation level of the greenhouse.

So, in the greenhouse heaters, the heating tools should be specialized for plants and greenhouse usage. Such sort heaters are made by balancing the heating conditions as well as all other necessary ingredients.

The task of that heater that doesn’t dry out the plants is to regulate the greenhouse temperature and balance out various other factors. That includes the total heat in and out, moisture and humidity, airflow, maintaining an ideal temperature, etc.

What are the other reasons that can add more for drying out your greenhouse plants?

As told before, various other external factors add along with the heater to dry out your plants inside a greenhouse. So, the problem should always not be only with the heater. But, for some instances, even if everything goes well with the heater, your greenhouse plants can still dry out due to those responsible factors.

So, balancing from every inch becomes indisputable to protect your plants from drying. Some of those reasons and mistakes that make your greenhouse plants dry out are:


Along with the sunlight, a perfect balance of shade is always what your plants ask for. Plants are so much delicate that they cannot tolerate the excess of anything. So, it doesn’t matter if the plants are seekers of longer daytime lights or shade-tolerant plants; shade is a must.

Even in the days of winter, when sunlight becomes the ultimate fuel for your plants to live and survive, then also the plants require shades. This is primarily applicable for the greenhouse plants as the house capture and stores so much heat during the sunny winter days.

Those captured heats, along with the direct exposure of sunlight to the plants, can result in their cooking. So, the plants need to be saved by enabling them with shades. The shade can be in the form of a pulley system both inside or outside the roof.

That is to say; there are various shade materials available in the DIY stores that can be used as pulley systems to cover the roof of your greenhouse.

Also for digitalized greenhouse system, there are many electronic monitorization systems of automatic shade system that runs through the response of UV lights of the sun. But, this sort of system is always expensive and can be switched with the effective manual alternatives mentioned before.


Again, proper ventilation also becomes one of the crucial tasks of the greenhouse. As a greenhouse is responsible for capturing more light and heat than usual, it should also release the excess of those in times of need.

And that is through proper ventilation. When plants become tired of too much heat and lack of humidity, ventilation can emit those excess content to sustain the house’s sustainable condition.


In the greenhouse, filling soil containers with regular or garden soil may call up massive disasters. This can result in the attack of various pests, diseases, imbalance in the type and texture of the soil, the overall effort in the plant’s growth, and so on.

A whole balanced system like the greenhouse can be imbalanced only for such sort of soil. Also, such earth can be dried from the upper portion, whereas the lower part inside the container may remain jam-packed with water.

Such types of soil are not suitable for your plants to live and also become more challenging for you to carry or transport heavy containers.

So, you need to choose potting soil for your greenhouse, and one of the great options would be going with the hydroponic greenhouse. Such systems don’t even include soil in the first place.


If the main base is unsuitable, it doesn’t matter how perfect you go with all other factors; the desired yield can never be met. And this base is the plant itself. So, you should also be aware of your plant’s selection before cultivating them in your greenhouse.

Because every plant has its feature and demands, a correlation between them plays a significant role in your greenhouse.

That is to say; a too-long plant can end up shading the short plants. This may result in exploiting the short plants by not letting them contact light.


A single type of fertilizer is not always suitable for all varieties of your plants. Every plant has its fertilizer demand same as the variation in soil, shade, and water requirements.

So, always group the plants with similar fertilizer requirements and supply them with their desired ones. Providing compost fertilizers to those plants that ask for more in-organic fertilizers will not yield effective results.

When plants’ nutrition from fertilizers is not met, the ultimate result can also lead to their drying up.

Final Thoughts

The most common sort of heater used for the greenhouse is an electric fan heater. Also, propane heaters are used to maintain lower costs with higher yields. One can also consider an RMH heater that runs through renewable energy and is best for greenhouse maintenance.

Considering such specialized greenhouse heaters lessen the chance for your plants to dry out.

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