Hoya 'Rosita'

The story of Hoya 'Rosita'

Hoya ‘Rosita’ is a cultivated hybrid between Hoya wayetii and Hoya tsangii.

How to care for Hoya 'Rosita'

Bright indirect light suits ‘Rosita’, with shelter from hot sun. Let its stems hang or guide them onto a support. Keep it around 16–24°C while growing, away from cold draughts. In dry air, use a humidifier to raise humidity and allow gentle airflow around the plant.

Use an airy mix in a pot that drains freely. Water when the container is lighter and the deeper mix is only lightly moist. Soak the roots and drain off all excess. When growth slows, allow the mix to become fairly dry between waterings, without drying it completely.

A light balanced orchid feed about every two weeks supports active growth; follow the label and pause if growth stops. Repot once the roots fill the container, choosing one only a few centimetres wider. Before feeding again, check whether the fresh mix already contains fertiliser.

A two-node stem cutting can root in water. Wear gloves and use a clean blade, as the milky sap can irritate skin. Remove the lower leaves, submerge the lower node and keep the upper leaves above the water. Give indirect light, keep new roots underwater, and transfer to a small pot of airy mix once rooted.

Troubleshooting Hoya 'Rosita'

• Leaf drop or wilting with wet roots: Persistent wetness can damage roots. Drain trapped water and inspect roots if decline continues. If you find a small amount of root rot, use a clean, disinfected tool to cut the soft roots back to firm, healthy tissue. Throw away the rotten roots and old mix. Repot in fresh, airy mix, using a clean pot just large enough for the roots that remain. The pot must have drainage holes. If decay is widespread, save only healthy stem cuttings. Discard the plant if no healthy stems remain, and disinfect your tools afterwards.
• Sudden blackening or leaf drop after cold exposure: Chilling can damage leaves and stems, especially beside cold glass or in a draught. Move the plant to a stable, warmer position. Check the mix before watering; a chilled plant may use water more slowly. Remove only tissue that is clearly dead or decaying.
• White wax beneath leaves or at stem joints: Confirm mealybugs beneath the wax and isolate the plant. Remove visible insects with a damp swab or tweezers. Inspect sheltered leaf joints, stems, the pot and any support weekly, removing any mealybugs you find until none remain. If mealybugs persist, use a product approved for home use against mealybugs on indoor ornamental plants in your country. Follow the label for how much to use, where to apply it, when to repeat treatment and all safety precautions.

Hoya ‘Rosita’ 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.

The meaning and history of Hoya

Hoya honours the English gardener Thomas Hoy.

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