What Is the Best Temperature for House Plants? - Backyard Boss
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What Is the Best Temperature for House Plants?

Whether you want to start growing plants indoors or you already have an indoor garden, there are a few things you should know about plant care. Even if you have a watering schedule or the perfect soil, you may not know the best temperature for indoor plants. It’s an often overlooked detail that could keep your plants from flourishing, or keep them from surviving. By keeping the temperature in your home ideal, you can create an optimal growing environment for your plant. Find out everything you need to know about the optimal temperature for your plants. Then, set your thermostat and watch your plants thrive.

Why Does the Temperature Matter?

You might wonder why the temperature of your home matters. After all, most homeowners use air conditioners and heaters to keep their homes comfortable, regardless of the temperature outside. 

But a temperature that’s comfortable for you isn’t always comfortable for your plants. In fact, some indoor plants are fussy and only survive in certain temperature ranges.

Even if a plant can survive a vast range of temperatures, it may not thrive under all conditions. The plant might not flower, or the leaves could fall off. If you want your plant to do well, you need to make sure the temperature is just right.

houseplants in cold weather woman in coat and scarf shopping for indoor plants in winter

So what is the best temperature for indoor plants? The question doesn’t have a straightforward answer. All of the following factors affect the situation:

  • Type of plant
  • Humidity level
  • Season
  • Time of day

That said, most plants have a similar tolerable range for temperature. Read on to learn more about the best temperature for indoor plants.

How Cool is Too Cool for Indoor Plants?

Anything under 50 degrees is potentially dangerous for a house plant. When the environment gets too cold, your plant won’t be able to grow. Eventually, the cold will cause it to die. Although there are exceptions, most indoor plants prefer being in environments that are between 65 and 75 degrees during the day. At night, they tend to prefer a range of 55 to 65 degrees. 

Most tropical houseplants can survive lower temperatures, but they won’t thrive. Generally, temperatures below 50 degrees aren’t tolerable for indoor plants. 

Can Houseplants Survive 40 Degree Temperatures?

For most indoor plants, 40 degrees is too cold. This is especially true when the temperature drops from a warm temperature to 40 degrees. Sudden drops in temperature are one of the most common causes of plant death. 

Even if your plant can survive low temperatures outdoors, it won’t be able to do so in your home. Once a plant gets accustomed to indoor temperatures, it’s unlikely to be able to withstand the cold.

If your home will be 40 degrees for an extended period, you should cover your plants. But covering isn’t necessary if you expect the cold weather to only last one night.

If you do cover your plants, use an appropriate covering. Plants that are in direct sunlight should only be covered with black plastic. Clear plastic gets too hot in the sun, which makes it a bad option for plants that are in sunlight. 

When Should You Cover Plants at Night?

You should only cover plants at night if the temperature will be low for more than one night. Fortunately, this isn’t usually an issue for indoor plants. If you keep your plant on a patio or lanai, you should consider bringing them indoors during a cold spell.

While 40 degrees is too cold for most inside plants, there’s a chance your plant will survive. Once you adjust your thermostat to a more comfortable temperature, the plant could bounce back. Just be sure not to overcompensate and make your home too warm.

Most indoor plants can’t survive for long in 35 degree weather. In freezing conditions like this, damage to plants can be irreparable. However, there are some succulents and cacti that can handle the cold. Additionally, there are some things you can do to keep your plants growing in the winter.

Do Plants Grow Better in Warm or Cold Temperatures?

hot weather plants thrive indoors from above succulents on colorful tablecloth

Because most indoor plants are tropical, they do better in warm temperatures than they do in cold temperatures. There are some plants that can handle the cold, but they are still capable of surviving warm weather.

Temperatures that are too warm can have a negative effect on your plants. However, the heat might not be enough to kill them. If you notice your plants wilting or drooping, you should troubleshoot and consider whether or not the temperature is too high. The plant is likely to recover as soon as you drop the temperature. 

On the other hand, a plant is less likely to survive in the extreme cold. The shock of the temperature drop by is often enough to kill a plant. 

Do High Temperatures Make Indoor Plants Grow Faster?

Warm temperatures are necessary for most plants to grow. In fact, tropical plants tend to grow at a faster rate in warm temperatures.

By keeping your home warm enough, you may be able to speed up the growth of your plants. Some plants also need heat to germinate. 

That said, you don’t need to crank up the heat too much. If your home is too warm or you have a plant that can’t handle the heat, you’ll end up doing more harm than good. If flowers die out too quickly or the lower leaves are wilting, your home could be too warm. 

Should You Adjust Your Thermostat?

Don’t let the recommendations for the best temperature for indoor plants make you think you need to live in discomfort. If you keep your home a moderate temperature, your indoor plants should survive. No matter what season it is, keep your home cool but comfortable. Keep your plants away from the window in the winter to avoid drafts.

indoor temperature thermostat on wall with hand and small dogIt’s worth mentioning that temperature isn’t  the only factor that will affect your plants. If you want the best results, you should also consider the lighting and humidity level. 

With a little TLC, your indoor plants will flourish. Keeping your home the right temperature is one of the best ways to keep your greenery looking great. 

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