Hoya ‘Mathilde’

From a Belgian hybrid seed pod

Hoya ‘Mathilde’ began in Belgium in 1994, when Emilio Begine raised seedlings from a pod produced by an outdoor-pollinated Hoya carnosa. The pollen parent was Hoya serpens, and the same pod also produced the sibling cultivar ‘Chouke’. ‘Mathilde’ was first published as a named cultivar in 2003, followed by a fuller description in 2005.

Its parents come from contrasting Asian forest regions. Hoya carnosa grows on trees and rocks in subtropical mountain forest from southern China and Laos to southern Japan and Taiwan, generally around 200–1,200 m. Hoya serpens comes from the Himalayas and the Andaman region, where its small stems creep and root in cooler, humid forest. ‘Mathilde’ combines these backgrounds in a cultivated hybrid.

How to care for Hoya ‘Mathilde’

• Light: A position with bright filtered light suits it well. Gentle morning or late-afternoon sun can support compact growth and flowering after gradual acclimation, while hot midday sun can mark the leaves.
• Water: Once the upper half of the substrate is dry and the container is noticeably lighter, soak the root ball thoroughly. Let the excess drain completely. Avoid repeated bone-dry periods: the small leaves and fine roots can lose water before the foliage looks severely wilted.
• Temperature and humidity: Aim for 16–24 °C while it is actively growing. Keep it frost-free and away from hot, drying air. Moderate-to-high humidity supports the fine stems and aerial roots when steady air movement prevents damp, stagnant conditions.
• Substrate, feeding and repotting: A blend of small orchid bark, pumice and a little coir keeps the roots aerated without drying abruptly. Feed lightly with a complete fertiliser while new growth is extending, and occasionally water with plain water to reduce salt build-up. Repot when the mix compacts or drainage changes, using a pot with holes only slightly larger than the root ball.
• Growth and flowers: Let the fine stems trail, climb a small support or root onto a mount. Leafless searching shoots can be guided rather than removed. Bright light, healthy roots and reasonably steady moisture support flowering. Keep healthy flower spurs because they can produce further clusters.
• Propagation: Divide a healthy vine into short sections, making sure each piece has a healthy node and growth point. Place the lower node in water, or set it into a moist blend of fine bark and pumice. Keep it warm in filtered light, with moisture around the node but plenty of air, until roots and a new shoot develop. Seedlings are genetically different plants and do not remain ‘Mathilde’.

Solving common problems with Hoya ‘Mathilde’

• Wrinkled or limp leaves: Check the potting mix and roots before watering. A dry, lightweight pot points to underwatering; damp mix with soft, dark or hollow roots points to root damage. Rehydrate a dry but healthy root ball thoroughly. Remove dead roots and replace collapsed, wet mix when roots are failing.
• Yellow leaves or stalled growth: Persistent wetness, compact substrate, cold roots or accumulated fertiliser salts are common causes. Improve drainage and airflow around the roots, let the mix partly dry and rinse it with plain water. Do not add more fertiliser until healthy growth resumes.
• Marks that resemble pests: The stable silver flecks inherited from its Hoya carnosa parent are normal. Fine moving dots, webbing, irregular stippling, sticky residue, cottony clusters or distorted new leaves suggest mites, scale or mealybugs. Inspect the crowded nodes and leaf undersides with a hand lens and isolate the plant. Remove small colonies with a damp swab or gentle rinse, then use a suitable houseplant pest treatment according to its label. Recheck hidden nodes as new insects hatch.
• Dry tips, leaf drop or failed buds: Hot dry air, a fully dry root ball, intense unacclimated sun or abrupt changes while buds are forming can trigger damage. Move it away from heat, restore steadier moisture and change light gradually. Keep healthy flower spurs even if a cluster drops. Translucent, dark or collapsed tissue after contact with cold glass or a draught is chilling damage. Keep the plant warm; if dieback continues from the base, restart a firm healthy node.
• Spreading rings or distorted growth: Expanding pale rings, patchy mosaic colour, black lines or malformed shoots are not normal splash. Isolate the plant, clean cutting tools thoroughly and take no cuttings. If the pattern continues spreading, testing is needed because appearance alone cannot confirm a virus.
• Root mealybugs: Cottony wax among the roots is not ordinary perlite or mould. Remove visible colonies, discard the infested mix and treat the cleaned root zone with a product labelled for root mealybugs.

Hoya ‘Mathilde’ around pets and people

• Non-toxic to pets: Hoya ‘Mathilde’ is considered non-toxic to cats and dogs. It is not edible, however, and chewing the leaves or vines may still cause mild drooling, vomiting or diarrhoea.
• Cut stems: Pruning can release clear sap. Wash it from the skin and keep it away from the eyes. Rare allergy has been reported after repeated exposure to its Hoya carnosa parent, so gloves are useful if plant sap has irritated you before.
• Trailing growth: Keep cuttings and low-hanging stems away from persistent chewers. If a pet eats a large amount or develops continuing symptoms, contact a veterinarian.

The names behind Hoya ‘Mathilde’

• ‘Mathilde’ and Hoya: Mathilde is a personal name, but the reason it was chosen for this cultivar was not recorded. Hoya takes its name from Thomas Hoy, an English gardener who worked at Syon House.
• Its parents: Carnosa means “fleshy” and describes the thick leaves of Hoya carnosa. Serpens means “creeping,” a reference to the low, trailing habit of Hoya serpens.