🔴 Invasive - Remove
Sweet Autumn Virginsbower
Clematis terniflora
This is an invasive species that harms native ecosystems. It should be removed when found to protect local plant and wildlife habitats.
Description
A nonnative perennial vine that grows aggressively, climbing over trees, fences, and other plants. It spreads quickly along the ground and can form thick, tangled mats that smother native plants. Vines can grow up to 20 feet long.
Where you'll find it
- Chain-link fences, roadside guardrails and hedges, in full sun.
- Forest edges and over low shrubs, where it forms a solid curtain of white in late summer.
- Near old gardens. It was, and still is, sold as an ornamental.
How to identify
The leaf
- Three to five leaflets with smooth, untoothed edges.
Colour and texture: Glossy, leathery, plain mid-green. The untoothed edge is the tell: our native virgin’s bower has clearly toothed leaflets and is otherwise very close.
How to identify it:
• Leaves: Grow in opposite pairs, with 5 to 7 smooth-edged leaflets (no jagged or toothed edges). Each leaflet is oval or heart-shaped. The top side is green; the underside is lighter.
• Flowers: Dense clusters of white, fragrant flowers with 4 petal-like sepals, blooming August-September.
• Seeds: Turns into fluffy, feathery seed heads in the fall, giving the vine a fuzzy look.
• Growth habit: Twining vine that wraps around objects for support, often smothering trees and shrubs.
Seedheads & fruit
Seedheads September–November.
Silvery-grey feathery plumes. Every seed trails a long curling hair, so the whole vine looks covered in whiskery pom-poms.
Why it matters: Those plumes are built to fly. Bag the seedheads before you touch the rest of the vine, or cutting it scatters a season of seed on the wind.
Preferred removal method
Bag the seed before you move the plant
Any plant carrying ripe seed or fruit. Once you start dragging it, you are sowing it.
- 1Spot the seedheads or berries before you touch the stem.
- 2Hold an open bag underneath and cut or bend the head straight into it. Close the bag before you move on.
- 3Bagged seed goes in the trash, never the compost or a brush pile. Most of these seeds survive both.
Avoid: Do not carry a fruiting plant across the site to a pile. That walk is how the next patch gets planted.
Cut a window in the vine
A woody vine climbing a tree. This is the safe way to free a tree: you never pull a vine down out of a canopy.
- 1
Disposal
Bag it. Bag the seedheads before you touch the rest of the vine. Those plumes are built to fly, and cutting first scatters a season of seed on the wind.
Don't confuse with a lookalike
Native Virgin's Bower vs Sweet Autumn Virgin's Bower
These two are the hardest pair in the guide. Same white four-petalled flowers at the same time of year, same feathery seedheads afterwards, same fences and forest edges. One is native and one is sold in garden centres and escapes into the woods. The edge of a leaflet is what separates them, and it is worth getting right before you cut.
Native Virgin's Bower
Clematis virginiana
Native: keepLeaflets with clearly toothed edges.
