What Temperature Should I Cover My Hydrangeas?

Cover your hydrangeas when the temperature drops below 32°f. Protecting them with a fabric cover will prevent damage to the flower buds that will produce blooms in the upcoming season.

Hydrangeas are popular for their big, beautiful, and colorful blooms. They are typically low-maintenance plants, but they do require some care during the winter months. If you live in an area with cold temperatures, your hydrangeas may be at risk of damage. To protect them, you need to know when to cover them. All hydrangea species need protection when the temperature drops below 32°f. At this point, the flower buds that will produce blooms in the upcoming season are at risk of damage. In this article, we will discuss why covering your hydrangeas is important and how to do it correctly.

What Temperature Should I Cover My Hydrangeas?

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Understanding Hydrangeas

Hydrangeas require specific care to thrive. Understanding the type of hydrangea you have will maximize its growth and vibrancy. Some of the most common types are mophead, lacecap, and paniculata. Each variety has unique soil, light, and temperature requirements. As for temperature, keeping them cool is best.

Covering them overnight during colder months ensures the plants will not be damaged. Conversely, if the temperature is too hot, keeping them shaded or misted will keep them healthy. Taking proper care of your hydrangeas will ensure they flourish and provide a beautiful addition to your garden.

Factors To Consider When Covering Hydrangeas

When considering covering your hydrangeas, it is important to pay attention to the temperature. The optimal temperature for hydrangeas is between 32°f-34°f. Any lower temperature can cause damage to the flower buds. Frost and freeze damages can occur when the temperature drops.

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It is crucial to cover hydrangeas promptly at the right time to protect them from late-season freezes. Avoid covering too early or too late when there is no actual threat of frost or freeze. Overall, timing and monitoring the temperature are critical factors in successfully protecting your hydrangeas from damage caused by cold weather.

What temperature is too cold for hydrangeas?

Covering Methods For Hydrangeas

When it comes to protecting your hydrangeas from frost and freeze damage, covering them is a must. To do this, you can use various techniques such as using blankets, burlap, or frost covers. The best materials to use are those that are breathable and lightweight, so your hydrangeas won’t suffocate or be weighed down.

Once you have your cover, it’s important to secure it properly using stakes or heavy objects. This will prevent wind or animals from causing any damage. By following these tips, your hydrangeas will be safe and healthy come springtime.

Removing Hydrangea Covers

When the spring approaches, it’s time to remove the hydrangea covers. Here are the steps to follow: first, check the weather forecast to ensure there is no risk of frost. Gently remove the covers, making sure not to damage any emerging buds or branches.

Gradually expose the plant to more sunlight over a few days to prevent any shock to the system. Finally, prune any dead or damaged branches before the season begins. However, there are common mistakes to avoid when removing the covers.

Pulling the covers too early or removing them too quickly can cause damage to the plant. Also, leaving them on too long can delay the growth and blooming process. By following these steps and avoiding these common mistakes, your hydrangeas are sure to thrive in the upcoming season.

Additional Tips For Caring For Hydrangeas

Proper care is essential for healthy hydrangeas, and weather plays a significant role in their growth. Besides covering them in cold temperatures, there are other weather-related considerations to keep in mind. Overwatering can lead to root rot, while underwatering can cause the leaves to wilt and dry out.

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Moreover, hydrangeas require balanced fertilization at least twice a year to thrive. Unfortunately, these flowers are prone to pests and diseases, so it’s important to be proactive in preventing common issues. Regularly inspecting for yellow or brown spots, spider mites, and powdery mildew can help ensure your hydrangeas stay healthy and vibrant.


The decision of whether and at what temperature to cover your hydrangeas can be a crucial one. As we have seen, the answer largely depends on the variety of hydrangea you have and the weather conditions in your area. If you have a macrophylla hydrangea and you live in an area with cold, dry winters, covering it may well be necessary to keep it from being damaged by the elements.

However, if you have a more cold-hardy variety, such as a panicle or smooth hydrangea, covering may not be necessary at all. Whatever the case, it is always a good idea to keep an eye on your plants and be prepared to protect them if necessary.

A little bit of care and attention can go a long way in helping your hydrangeas thrive year after year.