Question 1

What is the optimal temperature for Mallow?

Accepted Answer

The best temperature for Mallow depends on the time of year. There are two primary seasons to discuss for temperature: the growing season, and the dormancy season. During the growing season, once Mallow has begun to sprout, the ideal temperature range should be anywhere from 65~80℉(18~27℃). Any colder than 15℉(-10℃), and the plant will suffer; its leaves may brown and wilt, but if this is a short cold snap, then Mallow may be able to survive with some help.

During the warmer parts of the year, Mallow will need to be similarly protected from temperatures that are too high. 95-105℉ (35-40℃) is the top of this plant’s temperature range, and anything above that will compromise the integrity of the foliage and blooms of Mallow. Hotter temperatures can cause wilting, drooping, and even sunburn on the leaves, which can be difficult for Mallow to recover from. There are quite a few ways to combat this issue that are quick and easy!

Question 2

Temperature requirements for first year or seedling Mallow

Accepted Answer

If this is the first year of your Mallow outside as a new plant, then it may need a little extra tending during the coldest months of the year. Not only can frost more severely damage a first-year Mallow, but it can also prevent it from growing back as a healthy plant come spring. This plant needs to be kept at 40℉(5℃) or above when they’re not yet established, which can be done either by bringing your Mallow inside for a month or two, or putting up mulch or fabric barriers that protect from frost damage.

It’s also a good idea to plant Mallow in a shadier spot during the first year or two, as smaller and weaker plants have a more difficult time maintaining their own temperatures in the heat. First-year Mallow should receive no more than five hours of direct sunlight per day, particularly if the ambient daytime temperature gets above 80℉(27℃). Shadecloth and frequent watering or misting are the keys to summer heat control.

Question 3

How can I protect Mallow from extreme temperatures?

Accepted Answer

If cold temperatures (below 15℉(-10℃)) do occur during the growing season, there are a few measures you can take to help protect Mallow from frost or cold damage. If you’re growing Mallow in a container, then the container can simply be brought inside in bright, indirect light until the temperatures rise up over the lower threshold again. Another option that’s better suited for ground-planted Mallow is to use mulch or horticultural fabric to create an insulated barrier around the plant, which will protect the plant from frost and cold wind.

For temperatures that are hotter than 80℉(27℃) in the shade during the day, be careful to only expose Mallow to six hours or less of sunlight per day, preferably in the morning hours. Putting up shade cloth, or a fine plastic mesh, can help reduce the amount of direct sunlight that hits the plant during the hottest parts of the day. You can also install a misting system that allows for a slow release of cooling mist around the base of the plant during the day to lower ground temperatures.

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Dormant season temperature recommendations for Mallow

More Questions About Mallow

What is the optimal temperature for Mallow?

Temperature requirements for first year or seedling Mallow

How can I protect Mallow from extreme temperatures?