Bountiful Gardens

The Vertical Vixen: Mandevilla

Mandevilla is often confused with its cousin, the Dipladenia. While they look similar, Mandevilla is a true climber—it wants to go up. It uses twining stems to wrap around trellises, mailboxes, and pillars. The flowers are typically large (3–4 inches across) and come in shades of "Lipstick Red," "Cotton Candy Pink," and "Snow White."

Role in the Garden

• Design Category: Thriller. Because of its height and bold color, it is almost always the focal point of a large container or a garden bed.

• Best Placement: It is a "must" for trellises, pergola posts, and large privacy screens. It also makes a stunning "center-pole" Thriller in massive floor urns.

• Bloom Season: Late Spring through the first frost. It is a "marathon bloomer"—as long as it has heat and sun, it will not stop.

Care & Maintenance

• The "Twining" Assist: Mandevilla doesn't have "sticky feet" like ivy; it climbs by wrapping its stems. When you first plant it, you may need to gently "train" the stems around your trellis to get it started.

• The "Sappy" Warning: Like many tropical vines, Mandevilla has a milky white sap that can be irritating to sensitive skin. Wear gloves if you are doing heavy pruning.

• Pruning for Fullness: To prevent the plant from becoming a "single vine" at the top, pinch off the growing tips early in the season. This forces it to branch out from the base, giving you a much thicker "wall" of flowers.

• Drought Tolerance: It is surprisingly resilient. While it loves regular water, it has tuberous roots that store moisture, allowing it to survive a few days of neglect in the heat.

The Essential Tip for Beginners

The "Winter Over": Mandevilla is an expensive annual! Instead of throwing it away in October, cut it back to about 12 inches and bring the pot into a garage or basement that stays above 10°C. Water it only once a month. In the spring, move it back outside—it will explode with growth and give you a massive "head start" on the season!