Hoya surigaoensis is an exquisite Hoya species native to the Philippines, particularly the Surigao province on the island of Mindanao. This epiphytic vine, naturally found climbing on trees, is prized by plant enthusiasts for its distinctive and beautiful flowers. Understanding how to encourage these blooms is a common goal for collectors.
Characteristics of Hoya surigaoensis Flowers
The flowers of Hoya surigaoensis are small, star-shaped blooms, typically 1 centimeter in diameter. They feature gold-colored corollas, often with orange or burgundy tips, which contrast with a creamy-yellow or white corona. Their waxy texture gives them a unique porcelain-like appearance.
Individual flowers are arranged in clusters known as umbels. A single umbel can produce a significant number of blooms, sometimes up to 27 flowers at once. These flowers emit a sweet, coconut-like fragrance, which becomes particularly pronounced in the evenings. Blooms are relatively long-lasting, typically remaining open for about 7 to 8 days.
Essential Environmental Conditions for Flowering
Providing the correct environmental conditions is foundational for encouraging Hoya surigaoensis to bloom. The plant requires bright, indirect light to produce flowers effectively. While Hoya surigaoensis can tolerate lower light levels, insufficient light often results in reduced or absent flowering. Direct, intense sunlight should be avoided, as it can lead to leaf scorching.
Optimal temperatures are important for robust flowering. This species thrives in warm, consistent environments, with an ideal range typically between 15°C and 35°C (60°F and 85°F). Temperatures dropping below approximately 20°C (68°F) can cause the plant to enter dormancy, inhibiting flowering. Maintaining stable conditions without sudden fluctuations helps reduce stress and promotes better growth.
Consistent humidity levels contribute to the plant’s overall health and ability to flower. Hoya surigaoensis originates from tropical forest environments, indicating a preference for moderate to high humidity. Providing a humid environment, perhaps through a humidifier or pebble tray, can support healthy growth and encourage bloom development.
Care Practices to Encourage Blooming
Specific care practices directly influence the blooming success of Hoya surigaoensis. Watering should be managed carefully, allowing the potting medium to dry out almost completely between waterings. Overwatering is a common issue that can lead to root rot and prevent flowering. Some growers find that a slight period of water stress, or reduced watering leading up to the spring, can encourage the plant to initiate blooming.
Proper fertilization is important for promoting flower production. Fertilize the plant during its active growing season (spring and summer). Using a fertilizer with a higher phosphorus content can specifically support bloom development. A balanced liquid fertilizer, such as a 3-1-2 or 20-20-20 ratio, applied monthly at half strength or every other watering, can provide the necessary nutrients. Fertilization should be reduced or stopped entirely during the winter months when the plant’s growth slows.
Plant maturity also plays a significant role in when Hoya surigaoensis will bloom. Many Hoya species require a few years to mature before they are capable of producing flowers, with some taking between two and seven years. A plant with a stem length exceeding one meter may indicate sufficient maturity for blooming. It is important to avoid removing the spent flower peduncles, which are the stalks from which the flowers emerge. Hoya surigaoensis can rebloom from the same peduncle repeatedly over several years.
Troubleshooting Flowering Issues
When Hoya surigaoensis fails to bloom, several factors could be at play. The most common reason is insufficient light exposure. If the plant is not receiving enough bright, indirect light, it will prioritize foliage growth over flower production. Relocating the plant to a brighter spot or supplementing with grow lights can often resolve this issue.
Plant immaturity is another consideration; many Hoyas need more time to reach blooming stage. Patience is often the best approach. Incorrect watering practices also hinder flowering; overwatering leads to root rot, while consistent underwatering stresses the plant. Ensuring the soil dries out thoroughly between waterings is important for root health and bloom induction.
Improper fertilization can impact flowering. A lack of necessary nutrients or an NPK imbalance can prevent bud development. Switching to a higher phosphorus fertilizer during the growing season can help. Hoya surigaoensis often flowers more prolifically when slightly root-bound or in a snug pot; if the pot is too large, the plant may divert energy into root development rather than blooming. Avoid pruning tendrils or peduncles, as new flowers emerge from these structures.