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Bindweed Taking Over The Borders
Twining white-flowered stems are winding through the shrubs and perennials, and pulling them out only seems to make more.
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What's happening?
Bindweed is difficult for a specific reason: it regenerates from root fragments. Hedge bindweed and field bindweed both maintain a deep, brittle network of white roots, and almost every broken piece can produce a new plant. That is why digging and rotavating make an infestation worse rather than better — each cut multiplies it. Above ground it climbs anticlockwise through anything it touches, smothering shrubs and perennials and flowering as it goes. The two approaches that actually work are opposite in method: exhaust the roots by removing every shoot the moment it appears, over a long period, so the root system runs out of reserves; or get systemic weedkiller into the leaves so it travels down to the roots, which usually means training the growth up a support or into a container away from your plants. Ground elder behaves similarly and is often mistaken for it at ground level.
What usually causes it?
- An established deep root system already present when the garden was taken on
- Root fragments spread by digging, rotavating or moving soil around the garden
- Bindweed brought in with imported topsoil, manure, or a container-grown plant
- Regrowth from roots left under paving, a fence line, a shed base or a hedge where they cannot be reached
- Spread in from a neighbouring garden, verge or unmanaged plot along the boundary
- Cutting the top growth off repeatedly without exhausting or treating the roots
- Dense planting that hides the shoots until they are already through the shrubs
Is it dangerous?
No. It is not toxic and it does not damage buildings. The damage is to your other plants, which it smothers and pulls over. The one practical caution is what you do with the material: bindweed and ground elder roots survive a domestic compost heap comfortably, so root material should not go into compost you intend to spread on beds.
Can I fix it myself?
Yes, with persistence rather than force, and the choice is between two methods. Exhaustion means removing every shoot as soon as it appears, repeatedly, across seasons — it works but it needs you to keep at it. Chemical control means getting systemic weedkiller onto the leaves; the trick is to let the bindweed climb a cane or into a large pot away from your plants, then treat it there so nothing you value is hit. Whichever you pick, do not dig or rotavate an infested bed, and do not compost root fragments. Mulching and dense planting slow it but will not clear it.
When should you call a gardener?
Call a gardener when bindweed is through established shrubs and hedges you do not want to lose, when it covers a whole border, or when you have been pulling it for a season and it is no better. It is also worth calling to distinguish bindweed from ground elder and other spreading perennials, because that changes the approach. A gardener can run the repeated removal or the trained treatment through a season, which is what the plant actually needs.
What will the gardener actually do?
- Identify the species and map how far the root network extends, including under paving and along boundaries
- Clear the top growth carefully out of desirable plants without breaking roots into the soil
- Run a repeated removal programme so the root reserves are exhausted rather than merely cut back
- Train growth onto canes or into containers so systemic treatment can be applied clear of ornamental planting, timed to when the plant is moving resources down into the roots
- Lift and check adjacent plants where roots have grown into their root balls
- Dispose of root material off site rather than composting it, and re-mulch and replant the cleared ground
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