Question 1

What is the optimal temperature for Bittersweet?

Accepted Answer

The best temperature for Bittersweet 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 Bittersweet 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 Bittersweet may be able to survive with some help.

During the warmer parts of the year, Bittersweet 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 Bittersweet. Hotter temperatures can cause wilting, drooping, and even sunburn on the leaves, which can be difficult for Bittersweet to recover from. There are quite a few ways to combat this issue that are quick and easy!

Question 2

How can I protect Bittersweet 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 Bittersweet from frost or cold damage. If you’re growing Bittersweet 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 Bittersweet 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 Bittersweet 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.

Question 3

Dormant season temperature recommendations for Bittersweet

Accepted Answer

During the cold winter months, Bittersweet needs a certain measure of cold in order to stay in dormancy until it’s time to sprout. Sprouting too early, that is before the danger of the last frost has passed, can be fatal to Bittersweet, especially if it’s already had a head start when the frost hits. Winter temperatures should ideally stay below 32℉(0℃), but if they get up to 40℉(5℃), everything will be just fine.

An unexpected warm spell during the cold months, which can happen in more temperate climates like woodland rainforests, can trigger a premature sprout from Bittersweet. In this case, if there’s still imminent danger of frost, you may want to try covering it with clear plastic on stakes so that the cold has less of a chance of damaging the new sprout. This setup can be removed when the danger of frost has passed. Occasionally, Bittersweet will be able to resprout at the correct time without any help, but this method increases the chances of a successful second sprouting.

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Temperature requirements for first year or seedling Bittersweet

More Questions About Bittersweet

What is the optimal temperature for Bittersweet?

How can I protect Bittersweet from extreme temperatures?

Dormant season temperature recommendations for Bittersweet