Creeping bellflower: beautiful but evil, it’s the all-about-Eve of the garden


The beautiful but invasive blue creeping bellflower insinuates itself into a crowd of pretty perennials. Eventually, it will crowd them out.

I’m not saying anything new to long-time gardeners, but creeping bellflower, botanically known as Campanula rapunculoides, is one evil plant. Frankly, it’s a garden cancer, spreading rampantly everywhere and entwining itself around the roots of any plant in its way.Yes, it has pretty bell-shaped flowers in a lovely shade of almost-periwinkle, growing up two-foot-or-so stems, and yes, some people like it. The positive comments usually come from new gardeners unfamiliar yet with its wantonly evil ways.

I’ve heard gardeners say it quickly took over a difficult place where nothing else would grow, filling the large void at their summer cottage in no time at all, or quickly beautifying the dry sandy patch beside their house. A neighbour once called me over because someone had told her she had “the rare Persian bluebell” growing in the middle of her hedge. You can imagine my horror when I saw what it was, and I had to ask why she thought a rare plant would somehow start to grow in a dense hedge. Thank goodness she lived two streets away, although the despicable bellflower had already invaded my garden. When I think of it, maybe it was my plant that invaded her garden…

bellflower in bergenia

The small heart-shaped leaves in the centre of the larger leaves of Bergenia cordifola are of young bellflower about to claim what they think is their territory. They end up on my front path, below.

Yes, it can spread that far. I don’t know where mine came from (besides hell), but it spread from the back garden to the front in two seasons, despite my efforts to get rid of it. What did I do? The same as I do with the almost as invasive lily-of-the-valley: I dug (and dig) it out spring and fall and sometimes in between. The blasted plant has large carrot-like roots that look like grasping white fingers, and I learned quickly that I had to dig down a good foot to get to them.

bellflower roots

The roots of one young plant run deep and are as thick as carrots. You have to dig deep to get them out–and believe me, they’ll come back anyway. Trying to get rid of creeping bellflower is an exercise in frustration. Some gardeners say that once it’s made inroads in your garden, you’ll have it forever.

Trowel-digging and pulling up the hairy upper roots only encourages it to greater growth.
Deep digging, however, accomplished nothing and this past spring I realized the plant had spread to fill a roughly five-by-three-foot patch right in the centre of my front garden, wrapping around the roots of some thymes and ‘May Night’ salvia and making its way into ‘The Fairy’ roses. I got out the shovel again and dug up everyting, the bellflower, the salva and thymes (but not the roses–they’ll have to vanquish the bad guy themselves). Then I separated the good roots from the bad, replanted the good ones and stomped all over the bad ones. Believe me, they didn’t go into the compost bins.

In past years, especially in areas where the bellflower is growing closely with plants I really don’t want to dig up, I’ve tried Roundup, painting it on the leaves with a small artist’s brush to avoid nearby plants. I must say, the neighbours often wonder about me. Roundup contains glyphosate, the ingredient that kills broad-leaved plants, but unfortunately it’s now banned for cosmetic killing in Ontario, where I live. If you live here too, perhaps you have some left over from your attack on the poison ivy at the end of your garden, for which glyphosate is allowed. You’ll need lots, though–I’ve had to apply it two or three times to kill this nasty plant.

Creeping bellflower is sometime mistaken for Adenophora confusa,or ladybells, which are indeed more ladylike and don’t try to take over the garden. The blooms are almost identical, but Adenophoro has only fibrous roots, not the tuber-like roots of Campanula rapunculoides. (Both are members of the Campanulaceae family, by the way.) In the back garden I have other campanula, such as C. glomerata and C. persicifolia, growing in close proximity to the creeping bellflower, and sometimes it’s hard to tell the difference in the foliage. I’ve learned to look for creeping bellflower’s telltale reddish main stems, especially near the base of the plant, and the heart-shaped toothed leaves that get narrower the higher they grow on the stem.Leaves near the top are nearly stemless. The bell-shaped, five-lobed flowers have five stamens.

I try to dig plants out long before they get to the flowering stage because one strong plant can produce up to 15,000 seeds. Propagation from the roots is enough, thank you.

Somewhere I read that the leaves of Campanula rapunculoides have a pleasant mild flavour good in salads, and the young roots a sweet nut-like flavour.
Maybe making it a popular trendy new vegetable would be the best way to get rid of it.

Let’s compare notes: Do you have a pretty but invasive plant that’s taking over your garden? Tell us about it–maybe we can help.

6 thoughts on “Creeping bellflower: beautiful but evil, it’s the all-about-Eve of the garden

  1. I’m fighting the creeping bellflower, which seems to be taking over the front garden, the pathway along the side of my house, AND the edges of my back lawn. No matter how much I dig, I can’t seem to get rid of all the roots and tubers 🙁 The worst part is that my front garden and my neighbour’s garden are side by side, touching all along the length of the garden! I may be fighting this battle, but they’re content to let the creeping bellflower live on in their garden. Any suggestions for what to do? I have no glyphosphate, and both the neighbours and I have small kids that like to run around in the gardens….

  2. This is the most aggressive weed that I have ever dealt with. I have pulled them and dug them out, but they always seem to come back. The last 2 years, I’ve just smothered them with newspapers around my perennials and then added a thick layer of mulch over top. That has actually worked the best for me so far. Thank you for sharing this post.

  3. Finally!! I know what my Mama’s friend gave me. She called them Virginia Bluebells, as soon as they started really growing, I knew better! Two years later, I’m digging like a mad woman to get them out of my front bed, where they are trying to take over. I am giving them away right and left, oops, throwing them in the woods and banks where nothing grows. Thank you so much for this post and the helpful information. I’m in VA and although I’m not a fan of using Roundup, I’ll be mixing it up for this thing.

  4. I love the “evil” plant and I’ve been gardening for more than a half a century.
    We have a wild yard and garden that welcomes all living things… plant and animal.
    Living, surrounded, by a planned and “perfect” environment is not for us. At my age I have better things to do than try to tame my property…. like enjoying it.

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