If you've been browsing the gardening section lately, you've probably stumbled upon two names that sound suspiciously alike: Dipladenia and Mandevilla. You're not alone if you're scratching your head, wondering if they're the same plant, closely related cousins, or perhaps even a cleverly disguised marketing ploy. The truth? It's a bit of both. These vibrant flowering vines are indeed related, but there are key distinctions that matter when choosing the perfect plant for your space. We'll dive deep, unraveling the mystery and equipping you with the knowledge to become a Dipladenia/Mandevilla aficionado.
Let's start with the bigger picture. Mandevilla is the genus, the family name, if you will. Think of it as the surname. Within this family, there are multiple species, and Dipladenia was once considered a separate genus. However, taxonomic classifications (the scientists who love to categorize plants) have evolved, and most Dipladenia varieties have been reclassified and are now considered part of the Mandevilla genus. Thus, the simplest answer is: Dipladenia is now considered a type of Mandevilla.
However, confusion persists because the name "Dipladenia" is still commonly used. Garden centers and nurseries frequently label plants this way, as the name's popularity and recognition haven't faded completely. The shift has created a lingering terminological overlap. This means you'll find both "Mandevilla" and "Dipladenia" on plant tags, even for what are, in many cases, the very same plants. This reclassification is a lesson in the constantly shifting landscape of botany!
So, when you see "Dipladenia," the plant is most likely, taxonomically speaking, a Mandevilla. To avoid any further confusion, we will use both terms to acknowledge the legacy of Dipladenia and the botanical correctness of Mandevilla.
While the lines have blurred, some subtle differences can still help distinguish the varieties. The overall appearance and growth habits often provide clues. It's less a case of strict rules and more a case of recognizing tendencies.
Mandevilla (including what was once Dipladenia) varieties are typically known for their vibrant, trumpet-shaped flowers that come in a range of colors, including red, pink, and white. Some Mandevilla cultivars are known for their larger blooms and more aggressive growth habits. The foliage is generally glossy and deep green, providing an appealing backdrop for the colorful flowers. Overall, the plant has a more "vine-like" growth habit, easily trained to climb. They love to climb and create a visual impact on structures.
When the plant is smaller and less matured, it's easier to mistake the two. But it is very rare to find "true" Dipladenias (Dipladenia sanderi) nowadays in garden centers. They had smaller flowers and more compact growth. Their leaves tend to be slightly smaller and less glossy than some of the more vigorous Mandevilla varieties. As a rule, if you're shopping now, you're almost certainly looking at a Mandevilla that has been labeled "Dipladenia" for convenience.
Fortunately, the care requirements are relatively consistent whether your plant is labeled Mandevilla or Dipladenia. These tropical beauties thrive in warm climates and need similar conditions.
Sunlight is your friend: Mandevilla needs plenty of sunshine - at least six hours of direct sunlight daily. Insufficient light can lead to fewer blooms. A south-facing window or a sunny outdoor location are ideal.
Watering Wisdom: Water deeply when the top inch of soil feels dry. Overwatering can cause root rot, so ensure good drainage. The frequency will vary depending on temperature, sunlight, and pot size. In the growing season, they like consistent moisture, but less so in the dormant winter months.
Feeding Frenzy: Use a balanced fertilizer (e.g., a 20-20-20 or similar) during the growing season (spring and summer) to encourage flowering. Follow the manufacturer's instructions. Do not feed during the winter as the plant slows its growth.
With so many Mandevilla varieties, how do you choose the right one? Consider these factors:
Technically, yes. Most plants labeled "Dipladenia" are now classified as Mandevilla. The name "Dipladenia" is still used by gardeners to refer to this plant.
Mandevillas need plenty of sunlight (at least six hours per day), consistent watering (allowing the soil to dry slightly between waterings), and a balanced fertilizer during the growing season. Protect them from frost.
Ideal growing conditions include full sun (at least six hours per day), well-draining soil, and protection from frost. They thrive in warm, humid climates.