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UT Gardens’ August 2019 Plant of the Month: Butterfly Bush
Submitted by Shalena Durkot, UT Gardens, Crossville

Good Golly Miss Molly!

Buddleja x ‘Miss Molly’ is definitely a show stopper. It is hard to compete with the vivid color and abundance of this butterfly bush. This long-blooming beauty lasts from summer to frost! The fragrant blooms are great for cutting. Deadheading is not required but makes for a tidier plant.

  ut gardens butterfly bushes
Butterfly bushes are a popular addition to summer landscapes as they are colorful and attract hummingbirds and many sorts of beneficial insects including, of course, butterflies. Photo by S. Durkot of a "Miss Molly' selection at the UT Gardens, Crossville, courtesy UTIA.

They also attract pollinators and are a favorite of hummingbirds and, of course, butterflies.

The blooms are not the only attribute of the Miss Molly butterfly bush. The plant has a compact branching form and an average growth of between 4 to 5 feet. Miss Molly loves the sun and heat, is non-invasive, and deer resistant. The silvery-green leaves are another attraction, contrasting nicely with chartreuse or gold.

In addition to the ‘Miss’ series, other butterfly bushes have done well in the University of Tennessee Gardens. The ‘Pugster’ series has become very popular due to its compact size and full-sized flowers. Many are on display in all three UT Gardens’ locations: Knoxville, Crossville and Jackson. My favorite is the ‘Pugster Blue’ with its true-blue blooms.

If your garden space is limited or if you are looking for a miniature version, check out the ‘Lo & Behold’ series. Two of the smallest selections are planted in our Butterfly Garden in Crossville. ‘Blue Chip Jr.’ and ‘Pink Micro Chip,’ both average only 1 to 2 feet in size.

Although easy to grow, butterfly bushes can be sensitive to root rot. Many are lost due to wet soil and temperature fluctuations between fall and spring. So, plant butterfly bushes in such a way as to encourage water to drain away from the plant, not settle around it. This is particularly true when dealing with clay soil. You should also avoid mulching directly around your butterfly bush, as the mulch can hold too much moisture.

If pruning is desired, wait until after new growth emerges in the spring. This insures greater protection through the winter, especially in colder climates. This may require a bit of patience. Butterfly bushes tend to be one of the last to leaf out in the spring. Some say to wait well into June before determining whether they survived winter or a wet spring.

One last tip for establishing one of these beauties: avoid fall planting. Unlike most shrubs, butterfly bushes prefer ample time to develop a good root system before enduring the cold, wet season. Plant them in spring through summer. August is not too late, but now is the time.

Come and visit the UT Gardens, Crossville, located at the Plateau AgResearch and Education Center. Miss Molly will greet you at the garden entrance.

The UT Gardens includes plant collections located in Knoxville, Jackson and Crossville. Designated as the official botanical garden for the State of Tennessee, the collections are part of the University of Tennessee Institute of Agriculture. The Gardens’ mission is to foster appreciation, education and stewardship of plants through garden displays, educational programs and research trials. The Gardens are open during all seasons and free to the public. For more information, see the Gardens' website.

The UT Gardens, Crossville, also known as the Plateau Discovery Gardens, will host a Fall Gardeners' Festival on Tuesday, August 27, 2019. Attendance is free and doors open at 8 a.m. Central. For more information, visit Cumberland County Master Gardeners Association​.

For more information on The UT Gardens, please visit

Published August 2, 2019

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