Posted on: August 6, 2008
Reach For It
Add a garden trellis and watch your plants climb their way to success
By Chuck Ross
CTW Features
Image courtesy istockphoto
If today's gardens are becoming more like outside rooms, then trellises, arbors and other climbing-plant structures can be the walls, doorways and artistic final touches that give them definition and character. Whether as bamboo-stake teepees, romantic gated archways or simple lattice backgrounds, these double-duty additions provide eye-pleasing ornament to just about any setting, and create support for a number of popular climbing annuals and perennials. However, because all climbers don't climb alike, gardeners should understand their plant's particular habits before putting plans into action.
New interest in old-fashioned plants, along with the growing trend of patio and container gardening, has resulted in newfound attention for all kinds of climbers, from humble morning glories to showier roses and wisteria. In addition, experts say that many of these species grow quickly, helping even the newest gardens appear well established.
"It's the vertical plane," says Kathy LaLibert, a cofounder, horticulturist and director of gardening at Burlington, Vt.-based nursery and mail-order outlet Gardener's Supply, speaking of the extra dimension climbing plants can add. "New gardens, especially, a lot of times don't have a lot of height."
Tiny Tendrils
Interested in old-fashioned, heavy-blooming sweet peas, or perhaps considering grapes for your own personal vintage? These and other similar plants reach out with tiny tendrils to pull themselves upward and outward, and their structures need to incorporate small-diameter horizontal elements of 1/4-inch or less. String or wire can do the trick, and a homemade fence or bamboo or fallen branches also can work well - just keep the spacing to no more than 4 inches from one level to the next. Plastic netting is another option, so long as the mesh is at least 2 inches square, according to LaLibert�.
Leaf Twiners
Another popular group of climbing plants grows by twining either their leaves or their stems. Leaf twiners need slender supports so their leaves can wrap around them as they grow. Plants in this category include clematis and climbing nasturtium. Stem twiners will wrap themselves around whatever is in their path - from flag poles to chair legs (and any number of country mailboxes) - and include bittersweet, morning glories, honeysuckle and wisteria.
Clinging Vines
A third category of climbers can pose some sticky problems, supporting themselves with either adhesive pads - like Boston ivy and Virginia Creeper - or clinging stem roots - like English ivy or climbing hydrangea. Both groups can grow up or across almost any surface, including frame or brick walls, with no further support. But the adhesive pads can trap moisture against a building surface, and clinging roots can infiltrate and destroy mortar as they expand or contract, so use a trellis and be sure to allow enough room to provide adequate ventilation between it and adjacent structures.
Scramblers
Finally, climbing roses, bougainvillea and other "scramblers" don't really climb at all. Instead, they send out long, shoot-like branches that can be trained up and around a structure with flexible ties. They can adapt to almost any shape, and partner well with arbors and entryways.