Hoya rotundiflora

• Distinctive Leaf Morphology: Characterized by rare rectangular to square-shaped foliage with slightly scalloped edges and faint venation; a morphological deviation from typical ovate hoyas.

• Compact Architecture: Exhibits a naturally restrained, bushy habit, making it ideal for space-conscious horticulture and terrarium applications.

• Inflorescence: Produces umbel clusters of miniature, reflexed, corona-bearing flowers—typically white with yellow or pale green coronas—possessing a subtle, sweet fragrance.

• Rarity & Appeal: Considered a collector-grade species within the Hoya genus due to its unusual foliar geometry and low commercial availability.

Care Requirements:

• Light Exposure: Optimal under bright, indirect illumination; tolerates dappled morning sun but susceptible to foliar scorch under high-intensity direct light.

• Irrigation: Requires moderate watering; allow upper substrate (1–1.5 inches) to dry between waterings to prevent rhizosphere oversaturation and potential root hypoxia.

• Soil Composition: Prefers an epiphytic substrate blend—high in aeration and drainage—ideally composed of orchid bark, perlite, pumice, and coir or aroid mix.

• Temperature Tolerance: Best performance within 65–80°F (18–27°C); exhibits thermosensitivity—must be shielded from temperatures below 55°F (13°C).

• Relative Humidity: Thrives in elevated humidity zones (50–70%+); consider mechanical humidification or humidity trays in arid indoor climates.

• Nutrition: Apply a balanced, water-soluble fertilizer (e.g., 20-20-20) at quarter-strength monthly during the active vegetative phase (spring–early autumn); avoid fertilizing during quiescence.

• Pruning Strategy: Minimal intervention required—remove senescent foliage and spent peduncles post-bloom. Avoid excessive pruning, as flowers emerge from persistent peduncles.

Ideal Cultivation Contexts:

• Suited for microclimate-controlled environments, such as plant shelves, terrariums, or greenhouse alcoves.

• Recommended for specialty collections, particularly among epiphyte and Hoya enthusiasts seeking architectural foliage.

• Excellent for low-maintenance indoor horticulture, combining ornamental aesthetics with relatively undemanding care.

Would you like an advanced propagation protocol for Hoya rotundiflora via stem cuttings or guidance on bloom induction under artificial lighting?