Hoya sp. (Outer-variegated form; formerly sold as Hoya tsangii)

Origin and identity of Hoya sp. (Outer-variegated form; formerly sold as Hoya tsangii)

The narrow cream-margined plant entered cultivation under the name Hoya tsangii. That botanical identity remains uncertain.

Care for Hoya sp. (Outer-variegated form; formerly sold as Hoya tsangii)

Give bright indirect or diffuse light and protect the foliage from harsh direct sun. The cream margins mark readily under strong exposure.

Maintain warm, even room conditions with moderate humidity and gentle airflow around the variegated vine. Protect it from cold draughts and trapped warm air.

Use about 16–24 °C for normal growth. Move it warmer if conditions stay below 10 °C for an extended period.

Water after the surface dries and the small pot loses weight. Saturate the root ball evenly, then let the open mix drain before replacing the plant in its cover pot.

During active growth, apply balanced houseplant or orchid fertiliser lightly; taper feeding when new growth slows.

Let the growth hang or wind the newest flexible sections around a low hoop. Remove a dead runner at a healthy node and retain living flower spurs.

Small bark pieces and coarse mineral particles suit the fine root system. Refresh the mix if it becomes dense or drains more slowly. Move to a slightly larger container only when the roots need more room.

A healthy node-bearing piece of Hoya sp. (Outer-variegated form; formerly sold as Hoya tsangii) vine can be rooted for propagation; keep it warm until new roots form.

When Hoya sp. (Outer-variegated form; formerly sold as Hoya tsangii) needs attention

Pale margins crisp first

Cream edges show heat and interrupted moisture before the green centres. Soften direct sun, check that the whole root ball is wet after watering and trim only dead edge tissue if needed.

Spaces widen between new leaves

Increasing gaps between the narrow cream-margined blades can indicate weak roots or insufficient filtered light. Inspect the root ball first, then brighten the position gradually if it is sound.

Cream-edged growth pulls the low frame sideways

Anchor the low frame before rearranging the fine stems. Distribute young shoots across several ties so the narrow cream-margined leaves do not collect on one unstable side. White insects around the fine stem joints and old peduncles are mealybugs; isolate the plant and clean the sheltered leaf bases.

Hoya sp. outer-variegated form is non-toxic to people and pets

• This plant is non-toxic to people, cats and dogs.
• Chewing a large amount can still cause an upset stomach.
• If a large amount is eaten and symptoms continue, contact a veterinarian or medical professional.

What does Hoya mean, and who first published it?

Hoya honours the English gardener Thomas Hoy.

Robert Brown established the genus Hoya in 1810 in Prodromus Florae Novae Hollandiae, page 459.