Killer Vines and How to Spot Them

Telling the Good Guys From the Bad

Not all vines are the Devil — it just so happens that most of the ones people like to train up their houses are. This may be because they hang on for everything they’re worth, so a strong wind or a violent storm won’t result in a massacre. Whatever the reason, it’s led to a lot of damage to homes for hundreds of years, even if the homeowner never knew it.

Identifying damaging vines isn’t difficult, even the beginner horticulturalist can spot the differences once they’ve been shown what to look for.

Elements of a Damaging Vine

Vines don’t set out to destroy your home, they’re merely doing what vines do: climb. It’s just that some of the climbing methods that vines use tend to be fairly destructive in a long term kind of way. Vines have several different methods they use to climb. Some will literally grow in a spiral form to wrap around a nearby support, others send out specially modified parts called tendrils that coil around whatever they can find.

Those two types of climbers are basically harmless, at least as far as your siding is concerned. The real killers are the vines that climb using an adhesive disk or adventitious roots. Both adhesive disks and adventitious roots are very difficult to dislodge once they’re established. You can imagine how this kind of tenacity could bust masonry, dislodge vinyl siding, pull down gutters and lift shingles from your roof.

Adhesive disk of P. quinquefolia

Vines with adhesive disks literally have shoots coming off the vine tipped with roundish pads that grip tight using an adhesive that the plant produces. A common troublesome vine that uses this technique is Virginia creeper (Parthenocissus quinquefolia). Virginia creeper is a beautiful disaster for houses pretty much everywhere. In the summer, it’s a deep green and as fall approaches, it turns to a burning red-orange. It can be hard to make a villain out of a vine like that.

Adventitious roots on brick home

Adventitious roots are a little less complicated, biologically speaking. These are just extra roots that the plant uses to grab hold of things by penetrating any available crack or nook that’s available. The plant doesn’t care if that happens to be a crack in a brick on your house or a nook in a tree somewhere. These structures look a bit like the air roots that orchids produce, or, for those of you who don’t cruise the floral department at your market, they can appear much like thick hairs and cause a centipede sort of effect on the leafless parts of the vine. English Ivy (Hedera helix) is a champ at producing these roots and also climbing up houses.