Hoya plants, often called “wax plants” due to their thick, waxy leaves, are popular houseplants known for their attractive foliage and unique, fragrant flowers. Among the diverse array of Hoya varieties, Hoya ‘Exotica’ and Hoya ‘Krimson Princess’ are frequently confused. Understanding their distinct characteristics helps in accurate identification. This guide clarifies the differences between these two popular Hoya varieties.
Key Visual Differences
The primary difference between Hoya ‘Krimson Princess’ and Hoya ‘Exotica’ is their variegation pattern. Hoya ‘Krimson Princess’ displays central variegation, with lighter, colorful areas appearing in the middle of the leaf. Its leaves typically show creamy white, pale yellow, or light pink hues in the center, bordered by solid green margins.
New growth on a ‘Krimson Princess’ often emerges with vibrant pink in the variegated sections. This pink gradually fades to a lighter cream or white as the leaf matures. The distinct placement of green on the outer edges and variegation towards the leaf’s core remains consistent.
In contrast, Hoya ‘Exotica’ features marginal variegation, with colorful sections appearing along the leaf edges. The center of an ‘Exotica’ leaf remains primarily green, while the outer margins showcase shades of cream, yellow, pink, or deep red. This pattern creates a striking outline around the green interior.
New leaves of Hoya ‘Exotica’ can emerge with intensely colored margins, sometimes displaying bright pinks, reds, or deep yellows, especially with adequate light. As these leaves mature, the vibrant marginal colors may soften, but the variegation consistently stays on the outside perimeter. Observing whether the color is in the center or on the edges is the most reliable way to differentiate these two cultivars.
Shared Traits and Care
Both Hoya ‘Exotica’ and Hoya ‘Krimson Princess’ are cultivars of Hoya carnosa, a widely recognized species. This botanical classification explains their shared characteristics and similar care requirements. As vining plants, they grow long, trailing stems, well-suited for hanging baskets or climbing.
Their flowers are remarkably similar, reflecting their Hoya carnosa lineage. Both produce clusters of small, star-shaped, waxy flowers, typically appearing in shades of pink or white with a darker red center. They often emit a sweet fragrance, especially in the evenings. These blooms develop from peduncles, which should not be removed after flowering as new blooms can emerge from the same spot.
Care for both ‘Exotica’ and ‘Krimson Princess’ is consistent due to their shared genetics. They thrive in bright, indirect light, which encourages vibrant variegation and flowering. Direct, intense sunlight can scorch leaves, while insufficient light may cause variegation to fade and hinder blooming.
Water when the soil has largely dried out, as Hoyas are susceptible to root rot in overly wet conditions. A well-draining, airy potting mix, such as one containing perlite and orchid bark, is beneficial for healthy root development. Both varieties prefer warm temperatures, ideally 65-80°F (18-27°C), and appreciate average to higher humidity levels. Light fertilization during the active growing season supports their development.
Understanding the Naming Confusion
Confusion surrounding Hoya ‘Exotica’ and Hoya ‘Krimson Princess’ often stems from imprecise naming in the plant market and historical overlap with other cultivars. Many refer to Hoya ‘Exotica’ as Hoya ‘Krimson Queen’, which complicates identification. ‘Krimson Queen’ is a distinct variety that shares the marginal variegation pattern with ‘Exotica’.
Nurseries and online vendors sometimes use these names interchangeably or inaccurately, adding to the difficulty for consumers. This market-driven nomenclature can overshadow the precise botanical distinctions that differentiate these cultivars. Despite common mislabeling, ‘Krimson Princess’ and ‘Exotica’ are genetically distinct cultivars with unique visual characteristics.
The ‘Krimson Queen’ name often refers to a variegated Hoya carnosa with pink or red edges, similar to ‘Exotica’, while ‘Krimson Princess’ specifically denotes central variegation. Understanding these distinctions is key to accurately identifying and discussing these plants. Recognizing the precise variegation pattern remains the most reliable method for distinguishing them, regardless of naming inconsistencies.
Which Hoya is Right for You?
When choosing between Hoya ‘Exotica’ and Hoya ‘Krimson Princess’, personal aesthetic preference for variegation pattern is the primary deciding factor, as their care requirements are identical. If you are drawn to leaves with vibrant colors along the edges and a green center, Hoya ‘Exotica’ might be more appealing. Its marginal variegation creates a striking frame around the green.
Conversely, if you prefer colorful variegation prominently in the center of the leaves, surrounded by green margins, Hoya ‘Krimson Princess’ is a suitable choice. The vibrant pink new growth on a ‘Krimson Princess’ is also an attractive feature. Given their similar care needs, the decision rests on which visual presentation complements your plant collection or personal taste. Both varieties offer the rewarding experience of growing a beautiful and relatively low-maintenance Hoya plant.