Hoya finlaysonii (Sukhirin) – Silvery Patterned Foliage from Southern Thailand

Hoya finlaysonii (Sukhirin) is a striking regional form of Hoya finlaysonii Wight, originating from the humid forests of Sukhirin in southern Thailand. This cultivar is known for its thick, leathery leaves with bold dark green veins and shimmering silver speckles. The sculptural foliage, slow vining growth, and occasional blooms make it a rare and rewarding addition to any well-lit indoor space.
What Makes Hoya finlaysonii (Sukhirin) Stand Out?
 
Distinct leaf pattern: Wide, oval leaves with a matte green surface, high-contrast venation, and scattered silver markings create a unique textured appearance.
 
Slow-growing vine: Can climb if trained or trail naturally. Compact internodes and firm foliage make it easy to shape and style.
 
Occasional blooms: Produces creamy, star-shaped flowers with deep red centers. Lightly fragrant, usually on older peduncles.
Where Hoya finlaysonii (Sukhirin) Comes From
This form was collected in Sukhirin district, located in Thailand’s Narathiwat province. In nature, it grows epiphytically on trees in shaded, moist lowland forests. The plant thrives in high humidity, warm temperatures, and filtered light — all of which can be mimicked indoors with the right setup.
Indoor Care Guide for Hoya finlaysonii (Sukhirin)
 
Light: Prefers bright, indirect light. Some gentle morning sun is fine, but intense midday light may fade leaf pattern or cause stress.
 
Watering: Allow 80 – 90% of the substrate to dry between waterings. Always use a pot with drainage and avoid letting the mix stay damp.
 
Humidity: Performs best in 60 – 70% humidity. Can tolerate less for short periods, but higher levels help preserve leaf texture and color.
 
Temperature: Ideal range is 18 – 26°C. Protect from sudden cold and avoid placing near heaters, vents, or windows in winter.
 
Substrate: Use a chunky, airy mix of orchid bark, perlite, and coco chips or coir. Excellent drainage is essential for healthy roots.
 
Fertilizer: Feed monthly with a balanced, diluted liquid fertilizer (e.g., NPK 3-1-2). Continue year-round if the plant is actively growing.
Common Issues and How to Handle Them
 
Root rot: Usually caused by overly compact or wet soil. Use a well-draining substrate and let it dry thoroughly between waterings.
 
Yellow leaves: Can result from overwatering or insufficient light. Improve airflow, drainage, and light exposure as needed.
 
Pests: Watch for spider mites, mealybugs, and fungus gnats — especially in dry air. Treat early with neem oil or insecticidal soap.
Tips for Healthier, Fuller Growth
 
Support: Provide a moss pole, hoop, or trellis for upward growth. Alternatively, let vines trail from shelves or hanging pots.
 
Cleaning: Wipe dust from leaves with a soft damp cloth. Avoid chemical sprays or shine products.
 
Propagation: Take stem cuttings with at least 2 nodes. Let ends callous for a few hours before rooting in water, perlite, or moss.
 
Pruning: Trim long vines if needed, but don’t cut flower peduncles — blooms often reappear from the same spot.
Is Hoya finlaysonii (Sukhirin) Toxic?
This Hoya is not classified as toxic to pets or humans. However, its latex-like sap may cause irritation if ingested or touched — keep out of reach of curious pets and children.
Name Meaning and Botanical Background
The genus Hoya honors English botanist Thomas Hoy. The species name finlaysonii commemorates George Finlayson, a 19th-century Scottish naturalist who collected plants throughout Southeast Asia. “Sukhirin” refers to the specific Thai region this form originates from.
Answers to Common Questions
 
How often should I water it?Wait until most of the substrate has dried before watering. Avoid schedules — adjust based on light, warmth, and pot size.
 
What’s the best potting mix?A well-draining blend of orchid bark, perlite, and coco chips or coir ensures oxygen around the roots and avoids water retention.
 
How can I increase humidity?Use a humidifier, pebble tray, or group with other plants to maintain moisture levels near the plant.
Add Hoya finlaysonii (Sukhirin) to your collection for silvery-veined leaves, slow vining growth, and rare tropical beauty that thrives with minimal effort.