What is it? 2020 Invasive Plant Factsheet: Sweet Autumn Clematis (Clematis terniflora) It produces tremendous amounts of seed, allowing it to escape from cultivation into fencerows and roadsides where It forms a dense tangle that can smother native vegetation. I'm in Kansas City and would put the vine on my eastern fence, which gets a good dose of afternoon sun. Prune out and destroy affected foliage. What are invasive species and why should we be concerned about them? White, fragrant, four-petaled flowers appear in the late summer through the fall. White, fragrant, four-petaled flowers appear in the late summer through the fall. They include vomiting, excess salivation, diarrhea, mouth ulcers, dizziness, fainting, and convulsions. With these issues, look out for discolored foliage, small bugs on the foliage, and the plant generally failing to thrive. It blankets native vegetation and eliminates the basic source that plants need to make energy—sunlight, smothering vegetation beneath it. Sweet autumn clematis leaves and sap are toxic to both humans and animals. Use the appropriate fungicide or insecticide for the problem. It is reported to be invasive in a number of eastern states. To find the safest and most effective treatment for your situation, consult your state’s land-grant institution. If you will use chemicals as part of the control process, always refer to the product label. Stem cuttings can also be easily rooted. Sweet Autumn Clematis, officially known as Clematis terniflora or Clematis paniculata, is a gorgeous perennial vine which produces an abundance of sweet-smelling flowers late summer into early autumn. Native Species That Resemble Sweet Autumn Virginsbower. (5 to 7.6 cm) long. It is native to Japan and China and was introduced into the United States as an ornamental plant. It is considered invasive in many areas of the eastern U.S. Table 2. (5 to 7.6 cm) long. Toxicity from ingestion is most common, though eating a fatal dose is rare due to the plant’s bitterness and ability to cause mouth irritation. Prune aggressively in fall or early spring. I have read that sweet autumn clematis fits the bill but is considered invasive in some regions. Seed heads have long, silvery-gray, feather-like hairs attached. It was introduced into the United States in the late 1800s as an ornamental garden plant, and has naturalized in many of the eastern states. Find where this species is invasive in the United States. David Beaulieu is a garden writer with nearly 20 years experience writing about landscaping and over 10 years experience working in nurseries. It is reported as invasive in the eastern half of the U. S., in Arlington and Alexandria, and in… Sweet Autumn Clematis As its name suggests, Sweet Autumn Clematis produces a cloudlike abundance of sweetly fragrant, frothy white flowers in autumn. Leslie J. Mehrhoff, University of Connecticut. Foliage might appear dry, withered, and even black on affected plants. It commonly overgrows saplings and small trees, killing some. I got rid of my main plant 3 years ago and I still have them come up in several places in my yard. Roughly 1 inch of water per week, through rainfall or irrigation, is generally sufficient. Clematis terniflora prefers sun to partial shade and is found invading forest edges, rights of ways and urban green space especially near creeks. It needs a sturdy structure, as the plant can get quite massive and heavy. Clematis paniculata (Sweet Autumn Clematis) is listed in the Invasive Plant Atlas of the United States. The seed heads are feathery in appearance. This plant may be less frequently damaged by deer than other clematis species (hybrids). The flowers look pretty much the same as virgin’s bower, so you have to look at the leaves to tell which is which. This is a good time to double check populations you see to make sure it’s really the native virgin’s bower, and not the invasive sweet autumn clematis (Clematis terniflora). Sweet autumn clematis is in bloom around Texas right now. It does not have particular humidity requirements. Sweet autumn clematis grows vigorously in the climate conditions across its entire hardiness range from USDA growing zones 5 to 9. italics . Simply cut a 4- to 6-inch stem segment, plant it in ordinary potting soil, and keep the soil moist until roots develop. Sweet autumn virginsbower prefers sun to partial shade and is found invading forest edges, rights of way, and urban green space especially near creeks. Dave Powell, USDA Forest Service (retired), Additional Images for Sweet Autumn Virginsbower, Learning Resources for Sweet Autumn Virginsbower, Additional Information, Biology, Control and Management Resources, Terrestrial (land-dwelling) invasive species, Aquatic (Water-Dwelling) Invasive Species, Public Outreach and Education Materials (Invasive species), How to report an invasive species sighting to EDDMapS, United States Land-Grant University System. Grow on a trellis or a … It grows vigorously to 30 feet and reseeds freely. However, these vines can tolerate a considerable amount shade—unlike most other clematis species—as long as you are willing to put up with some reduced flowering. It is considered a Category II invasive plant in Florida (north and central) and some other eastern states, meaning invading native plant communities but not yet seen as displacing native species. Clematis terniflora, or sweet autumn clematis, is moving out of cultivation in Indiana and we’d like to know if you’ve seen it in the wild. Richard Webb, Self-employed horticulurist. What is the best way and place to report the occurrence of an invasive species? It has been reported to be invasive in Alabama, Delaware, Florida, Georgia, Illinois, Maryland, New Jersey, North Carolina, South Carolina, Tennessee and Virginia, although it is probably invasive in additional states where it occurs. How can I grow one?. Sweet autumn clematis (Clematis terniflora) is a perennial flowering vine that produces sweetly fragrant flowers in the late summer and early fall, well after most other clematis plants are finished blooming. As long as the disease hasn't spread throughout the entire plant, it will usually bounce back the next growing season. Companion Plants: Japanese Maple, Climbing Rose, Daylily, Hydrangea, Butterfly Bush. The spent flowers are replaced by fuzzy seed heads that are also attractive. As we sat fine-dining in the car, I saw them across the street. Sweet autumn clematis is listed on the South Carolina Exotic Pest Council Invasive Species List as a significant threat. Before planting check to be sure that sweet autumn clematis is not invasive where you live. Common Name: Sweet Autumn Virginsbower Scientific Name: Clematis terniflora Identification: Sweet Autumn Virginsbower is a perennial sprawling woody vine that may climb to 15 to 30 … This invasive species can be identified by looking for the characteristics described in the paragraphs that follow. The pinwheel flowers are fragrant and white with 4 petal-like parts and many stamens. The Spruce uses cookies to provide you with a great user experience. If you are worried by the question “Is this species of clematis invasive?”, you will soon find the answer. Clematis virginiana, devil’s darning needles – Images at invasive.org, Clematis ligusticifolia, western white clematis – Images at invasive.org, Dave Powell, USDA Forest Service (retired),bugwood.org, Joy Viola, Northeastern University,bugwood.org, Sweet autumn virginsbower – Images at Invasive.org. But … When covering wood fences or similar structures, a sweet autumn clematis in bloom gives the appearance of fleece. It was just beautiful and smelled lovely. See below This plant is an invasive species in North Carolina Description. Native to Japan and China. It is C. terniflora that you need to be careful with. Symptoms of toxicity are similar in people and animals. By using The Spruce, you accept our. Sweet Autumn Clematis can grow quite vigorously to the point of being invasive in warmer areas of the country. It is rather rare that a gardener would need to propagate sweet autumn clematis. I have read that it can be invasive but many of those reports come from warmer zones. Apply a low-nitrogen fertilizer, such as 5-10-10, in the spring. As with other clematis species, sweet autumn clematis is prone to clematis wilt, a potentially fatal fungal disease. Seed heads have long, silvery-gray, feather-like hairs attached. Learn tips for creating your most beautiful (and bountiful) garden ever. Plus, it self-seeds readily and can easily spread beyond its garden site. But if you're trying to get your vines to cover a large area, such as a big pergola, you can prune less severely and leave more of the plant in place. What troubles a lot of novices at gardening is whether clematis invasive. Regular feeding and watering will reward you with a large vine blanketed with white flowers by early fall. The similar-looking, but not very fragrant, Virgin’s-bower, C. virginiana, native to eastern North America blooms about the same time, and could be used instead, but is not as readily available in the horticulture trade. These masses of white flowers are borne on vigorous twining vines that will cloak a decorative support such as an arbor or ramble along a fence or pergola. However, it can be sparse and leggy near the base, so it is ideal to surround the lower area with other plants that hide the bottom of the sweet autumn clematis and keep its roots cool. Q: I saw a white blooming vine that smelled divine and was blooming in October. 5. A: Just when you thought there wasn’t much to enjoy in your garden as summer becomes fall, along comes Sweet Autumn Clematis (Clematis virginiana). However, sweet autumn clematis should be planted with caution, as it is a very vigorous vine that can choke out nearby plants. The only thing “sweet” about the sweet autumn clematis (Clematis terniflora) is its fragrance. The native species (C. virginiana) is very similar (margins of leaves of the native tend to be toothed) but not as prone to self-seeding and spreading. Plus, it self-seeds readily and can easily spread beyond its garden site. By September 2013 it had grown into a beautifully draped vine that graced the railing of the deck. I ordered a sweet autumn clematis about 15 years ago and planted it along our stockade fence -- it covered the whole fence and was absolutely gorgeous. To learn the easy way to spot it (spoiler alert—it’s the leaves! Sweet autumn clematis has average water needs. Seeds are best started in the late fall to early winter, and seedlings can be moved outside once nighttime temperatures remain above freezing. Clematis terniflora – Missouri Botanical Garden, Invasive.org – Center for Invasive Species and Ecosystem Health, Clematis terniflora – Illinois Wildflowers, Electronic Data Information Source – University of Florida IFAS Extension, Plant of the Week – University of Oklahoma Department of Botany & Microbiology, Sweet Autumn Virginsbower – National Park Service. Insect pests include aphids, slugs, snails, scale, earwigs, and spider mites. Leaflets are each 2 to 3 in. Discover beautiful U.S. native plant alternatives. And fragrant! This will limit the self-seeding that can lead to the invasive spread of the plant. While this Asian sweet autumn clematis is listed as invasive in several parts of the country, it is not in Connecticut * I planted this in 2012 at the east side of the deck where the kiwi vine had been. It is not recommended to plant sweet autumn clematis (C. terniflora), as it is a highly invasive vine. Sweet autumn virginsbower is an invasive climbing, semi-evergreen, ornamental vine. The ideal soil will have a slightly acidic to neutral soil pH, but even slightly alkaline soils generally support the plant quite well. Powdery mildew, leaf spots, rust, and viruses can also affect the plant, though generally, they are not fatal. Sweet autumn clematis is a vine that produces an abundance of small, white flowers in late summer and early autumn. If you determined to grow this strong-willed vine (or it's already growing in your landscape), be sure to keep an eye on it so that it doesn't get out of hand and invade other parts of your garden or natural areas. Although it can be used as a ground cover, sweet autumn clematis is more commonly found draped over stone walls or scaling structures such as arbors. Fungicides for Disease Control on Clematis. John D. Byrd, Mississippi State University. Sweet Autumn Clematis can be considered invasive in warmer climates, as it is native to New Zealand. Like all clematis species, this plant is a heavy feeder. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture. Location, habitat, weather, and a variety of other conditions are factors that help determine the best treatment choice. It can self-seed, and has escaped cultivation and naturalized in many parts of the USA. It should be used with care as it is considered invasive in some locations.Also known as Clematis maximowicziana. Introducing "One Thing": A New Video Series, The Spruce Gardening & Plant Care Review Board, The Spruce Renovations and Repair Review Board. But it is a bit slow to get going in the spring so now I wonder if I had been more patient, would it have come back from the roots. It is native to Japan and China and was introduced into the United States as an ornamental plant. The leaves are opposite, compound (with three to five leaflets), and the margins are entire. It is considered invasive in many areas of the eastern U.S. Like all clematis, sweet autumn is a heavy feeder. This will remove the seed heads and prevent them from growing unwanted plants. However, sweet autumn clematis should be planted with caution, as it is a very vigorous vine that can choke out nearby plants. Most gardeners cut their sweet autumn clematis plants down to within a foot or so from the ground. But if you want to share plants, the seedlings that sprout up around a mature plant can be transplanted wherever you wish. According to the U.S Forest Service, Invasive species have contributed to the decline of 42% of U.S. endangered and threatened species, and for 18% of U.S. endangered or threatened species. Invasive, Exotic Plants of the Southeast Sweet Autumn Virginsbower. Clematis terniflora is a perennial woody vine, native to Asia and introduced to North America as an ornamental. It also can cause irritation from skin contact, though not everyone experiences this. Last assessed by Brenda Howard 8/21/2019; Reviewed and approved by IPAC 10/30/2019 . It has a fast growth rate, gaining a few feet in length each year. Clematis terniflora (Sweet Autumn Virginsbower) - NC INVASIVE PLANT COUNCIL Sweet Autumn Virgin's Bower Sweet autumn virgin’s bower (Clematis terniflora), also known as sweet autumn clematis, is a vigorous woody vine that has fragrant flowers which bloom in the fall. Looking for advice on the advisibility of planting Sweet Autumn Clematis (clematis ternifora). There is an invasive version (Clematis terniflora), which should be avoided. Anyway, it's lovely. Sweet Autumn Clematis; Sweet Autumn Virginsbower; Previously known as: Clematis cuspidatum; Clematis dioscoreifolia; Clematis maximowicziana; Clematis paniculata ; Phonetic Spelling KLEM-ah-tiss tern-ih-FLOR-uh This plant has high severity poison characteristics. The leaves are opposite, compound (with three to five leaflets), and the margins are entire. This can take six to eight weeks. Is it a problem in containers in the DC area? If you want me to send you one I’ll be happy to dig one up for you. 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