Hoya rotundiflora is a charming and unique species native to Thailand and Myanmar, admired for its square-edged leaves and clusters of pure white, fragrant blooms. Unlike most Hoyas, which have rounded or elongated foliage, this species stands out for its geometric, almost rectangular leaves that grow in neat, opposite pairs along slender, trailing vines.

The leaves are thick, matte green, and slightly concave, giving them a sculptural quality that feels both modern and delicate. When mature, Hoya rotundiflora produces clusters of star-shaped flowers in shades of white to creamy ivory, each with a soft pink centre and a sweet, floral fragrance that intensifies in the evening.

Compact, elegant, and easy to grow, Hoya rotundiflora is a true collector’s favourite — a plant that combines subtle beauty, unique structure, and delightful blooms in one irresistible package.

Hoya rotundiflora – Care Guide

Light

Thrives in bright, indirect light. A few hours of gentle morning or late-afternoon sun will promote healthy leaf colour and encourage blooming. Avoid harsh direct sunlight, which may cause leaf scorch, or deep shade, which can slow growth and reduce flowering.

Watering

Allow the top 3–4 cm of soil to dry before watering. Water thoroughly, then allow excess to drain away. Hoya rotundiflora prefers light, consistent moisture but is sensitive to overwatering. During the cooler months, reduce watering frequency.

Temperature and Humidity

• Temperature: Prefers warm conditions between 20–30°C; avoid temperatures below 15°C.

• Humidity: Enjoys moderate to high humidity (60–80%), though it adapts well to average indoor conditions. If the air is very dry, mist occasionally or place near a humidifier to prevent leaf edge browning.

Soil and Potting

Use a well-draining, airy mix such as orchid bark, perlite, and coco coir, or a specialist Hoya substrate. This mimics its natural epiphytic environment and prevents soggy roots. Repot every 2–3 years, ideally in spring, to refresh the mix. Terracotta pots are ideal to allow moisture to evaporate naturally.

Feeding

Feed every 4–6 weeks during spring and summer with a diluted, balanced fertiliser or a bloom-enhancing formula rich in phosphorus. Suspend feeding in autumn and winter when growth slows.

Pruning and Maintenance

Trim long vines to maintain shape and encourage branching. Avoid cutting the peduncles (flower spurs) after blooming — new flowers will reappear from these same points. Wipe leaves gently with a soft, damp cloth to remove dust and showcase their distinctive shape.

Growth and Maturity

A moderate grower with a compact trailing habit, typically reaching 60–90 cm in length indoors. With good light and humidity, Hoya rotundiflora blooms readily, producing clusters of up to 20 delicate flowers per umbel that last for several days and emit a subtle, sweet fragrance.

Common Issues

• Yellow leaves: Overwatering or poor drainage.

• Wrinkled leaves: Underwatering or low humidity.

• Lack of blooms: Insufficient light or removal of flower spurs.

• Pests: Occasionally mealybugs or aphids; treat promptly with neem oil or insecticidal soap.

Background and Benefits

Discovered in Thailand and neighbouring regions of Myanmar, Hoya rotundiflora is a small epiphytic climber that grows on tree trunks and branches in humid tropical forests. Its unusual square-edged foliage and prolific flowering habit have made it a staple among rare plant collectors and Hoya enthusiasts alike.

The name “rotundiflora” refers to its rounded flowers rather than its leaves, which makes this species especially intriguing. Like all Hoyas, it is air-purifying and helps improve indoor air quality while adding a refined, minimalist tropical touch to your home.

Quick Care Summary

Light: Bright, indirect light; gentle morning sun preferred
Water: Let top 3–4 cm of soil dry between watering
Temperature: 20–30°C; avoid below 15°C
Humidity: Moderate to high (60–80%)
Soil: Airy, free-draining mix – bark, perlite, coco coir
Feed: Every 4–6 weeks in spring/summer
Growth: Trailing vine, 60–90 cm; matte green, square-edged leaves and white, fragrant blooms

⚠️ Toxicity note: Contains mild latex sap that may irritate skin and is toxic if ingested. Keep away from pets and children.

Styling Tip

Display Hoya rotundiflora in a hanging pot or trailing from a high shelf, where its distinctive angular leaves can be appreciated from below. The clean, geometric foliage pairs beautifully with round-leafed Hoyas such as Hoya krohniana ‘Silver’ or Hoya compacta ‘Variegata’ for a sophisticated, textural contrast. Its compact habit also makes it perfect for small spaces, terrariums, or curated Hoya displays in bright, airy interiors.