Hoya clemensiorum 'Kalimantan' (Clone 2) – Collector’s Choice with Bold Venation
Hoya clemensiorum 'Kalimantan' (Clone 2) is a rare regional form of Hoya clemensiorum (T.Green), described in 1991 and collected in Kalimantan, the Indonesian part of Borneo. This clone stands out with its dramatic, sculptural foliage: thick lanceolate leaves up to 20 cm long and 6 – 8 cm wide, with dark green veins etched across a pale green surface. Slow-growing but visually impactful, this is a must-have for serious Hoya collectors seeking texture, contrast, and wild origin appeal.


Why Hoya clemensiorum 'Kalimantan' Clone 2 Is So Sought-After


 
Sculptural Foliage: Thick, leathery leaves with sharply defined venation – every leaf feels hand-carved.
 
High Contrast Appearance: Deep green veins stand out over soft lime to olive backgrounds, making each leaf visually striking.
 
Climbing or Trailing Habit: Grows slowly as an epiphytic vine. Great for moss poles, trellises, or hanging pots.
 
Clone Identity: This form originates from Kalimantan and shows slightly more spread venation compared to Clone 1.
 
Flowers (Rare): May produce small, pale star-shaped umbels under ideal conditions, but flowering indoors is uncommon.


Essential Care for Hoya clemensiorum 'Kalimantan' (Clone 2)


 
Light: Bright, indirect light supports strong venation. Avoid intense sun exposure, especially midday rays.
 
Water: Water when the top 2 – 3 cm of soil is dry. Use breathable pots with drainage and avoid soggy conditions.
 
Substrate: Choose a loose, airy mix – orchid bark, perlite, coco coir, and pumice are ideal.
 
Humidity: Best results come at 60 – 80%. Below 50%, leaf edges may curl or growth may slow.
 
Temperature: Prefers 18 – 25 °C. Avoid cold drafts or exposure below 15 °C.
 
Feeding: Use a diluted balanced fertilizer monthly. No need for seasonal changes if growing conditions are consistent.


Clone-Specific Troubleshooting Tips


 
Root Rot Risk: This clone is especially sensitive to excess moisture. Ensure soil dries between waterings and drainage is excellent.
 
Yellow Leaves: Can signal too much water or too little light. Adjust care routine accordingly.
 
Drooping Foliage: Check for underwatering, dry air, or temperature stress. Moderate and stabilize conditions.
 
Pests: May attract mealybugs or mites in dry air. Treat early with neem oil or insecticidal soap if needed.


Advanced Care Tips for Clone 2


 
Support Structures: Provide vertical support early to promote upright growth and larger foliage.
 
Propagation: Root stem cuttings in water or moist, well-draining mix. Maintain warmth and high humidity during rooting.
 
Repotting: Only repot when root-bound. Hoyas prefer tight pots and dislike frequent disturbance.


Etymology and Background


The genus Hoya honors English botanist Thomas Hoy. The species name clemensiorum uses the Latin genitive plural to commemorate Joseph and Mary Strong Clemens, who collected extensively across Borneo. The “Kalimantan” designation identifies this particular clone’s Indonesian origin, highlighting its region-specific traits within the broader species.
Looking to add something rare, architectural, and wild-sourced to your collection? Secure Hoya clemensiorum 'Kalimantan' (Clone 2) today – this slow-growing gem is a standout among textured Hoyas and rarely available in cultivation.