Hoya sp. (sold as ‘aff. Icensis’)

Origin of Hoya sp. sold as aff. Icensis

The label describes a narrow-leaved Hoya that resembles plants circulated as Icensis. AH Seeds 023, Patcharawalai and Icensis are commonly used for a separate broad-leaved line in cultivation. The exact species and wild origin of the narrow-leaved stock remain unknown, and no botanical link between the lines has been established.

Care for Hoya sp. (sold as ‘aff. Icensis’)

• Light: Give the plant bright filtered light to keep the internodes compact and the arcing veins clear. Shield the narrow leaves from concentrated midday heat.
• Watering and roots: Rewater when the upper root zone feels dry and airy. Allow a longer interval when cooler conditions or slower growth delay drying. Use an open epiphytic mix that accepts water evenly without forming dry channels. Keep the stem base above the substrate.
• Narrow foliage: Give each long leaf enough space to unfold without rubbing the support. Prolonged complete dryness can damage the fine roots before the mature foliage visibly wilts.
• Support: Add a light support as soon as an exploratory runner develops, and tie only the stem. Leave the narrow leaves and petioles free from pressure.
• Temperature and airflow: Warm roots and gentle air movement support healthy new growth. Leaves should dry promptly after watering or cleaning.
• Feeding: Apply dilute fertiliser to damp roots while new leaves or roots are forming. Increase the interval between applications when growth slows.

Common issues with Hoya sp. (sold as ‘aff. Icensis’)

• Lower foliage yellows before the root ball has driedLikely cause: Old substrate is holding together too densely around the root system.What to do: Examine the roots at once. Trim back to firm tissue and repot the remaining roots in a clean container with airy fresh mix.Urgent warning: If rot rises above the root crown, preserve the plant by taking a firm green node from unaffected growth.
• The green climbing tip pauses without dying backLikely cause: Recovery from drought, repotting or changed light is delaying the next leaf.What to do: Guide the firm green runner on its support and keep it in bright filtered light. Remove only sections that become soft, blackened or completely dry.
• The newest long narrow leaves are distorted and the nodes feel stickyLikely cause: Thrips, mites, scale or mealybugs may be feeding on the developing leaf and around the nodes.What to do: Separate the plant and inspect growing points, nodes and the undersides of the narrow foliage. Wash both sides of the narrow foliage, remove visible pests, and use insecticidal soap after a patch test. Use the treatment again only at the interval stated on the label, checking the narrow leaves for sensitivity first.
• Fine roots dehydrate while the mature leaves still look firmLikely cause: A small root mass could not sustain the thin vine through prolonged dryness.What to do: Wet the pot slowly until the substrate accepts water, then water again whenever the upper mix has dried. Keep a firm runner and remove it only if the node tissue turns black, hollow or soft.

Hoya sp. (sold as ‘aff. Icensis’) and pet safety

Hoya sp. (sold as ‘aff. Icensis’) is treated as non-toxic to cats and dogs. Chewing leaves or stems can still cause temporary drooling, vomiting or diarrhoea. Keep the plant out of reach of pets that chew foliage, and contact a veterinarian if symptoms are severe or persistent.

The meaning of aff. Icensis

“Aff.” abbreviates the Latin affinis, meaning related to or resembling. The qualifier “aff.” indicates resemblance to the cultivated Icensis line, while the plant’s exact identity remains unresolved.