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Hoya sigillatis Silver is a rare and elegant cultivar of the Hoya sigillatis species, native to Borneo. Like all Hoyas, it belongs to the Apocynaceae family and is admired for both its ornamental foliage and starry, fragrant flowers.
The Silver form is especially collectable because of its distinctive foliage. The leaves are narrow, elongated, and leathery, marked with generous splashes and mottling of silvery-grey across a dark green background. The silver can cover much of the leaf surface, giving the plant a luminous, shimmering look under bright light.
When mature, Hoya sigillatis Silver produces umbels of small, star-shaped blooms in shades of burnt orange to reddish-brown, each with a glossy finish and a pale corona at the centre. These flowers are strongly scented and long-lasting, adding to the plants value as a display specimen.
Its trailing growth makes it perfect for hanging baskets, tall shelves, or training onto trellises, where its silver-patterned leaves can cascade elegantly.
Thrives in bright, indirect light. A few hours of soft morning sun helps intensify the silver markings. Avoid prolonged direct sun, which may scorch the narrow leaves.
Water when the top 23 cm of soil feels dry. As a semi-succulent, this Hoya tolerates short droughts but dislikes soggy conditions. In winter, reduce watering.
Temperature: Prefers 1828C. Avoid exposure below 15C.
Humidity: Enjoys higher humidity (6080%), but will adapt to household conditions. Use a humidifier or pebble tray in drier homes.
Use a chunky, airy, and free-draining epiphytic mix: orchid bark, perlite, and coco husk blended with a little compost works well. Hoyas like to be slightly root-bound, so repot only every 23 years.
Feed monthly in spring and summer with a high-potassium fertiliser to encourage flowering. Stop feeding in winter.
Prune vines lightly to manage shape and encourage branching. Do not remove peduncles (flower spurs), as Hoyas rebloom from the same sites repeatedly.
A moderately fast grower that develops long trailing stems. Flowers appear on established plants grown in bright, warm, and humid conditions.
No flowers: Caused by insufficient light or removing spurs.
Yellowing leaves: Overwatering or poor drainage.
Faded silver markings: Insufficient light.
Pests: Can occasionally attract mealybugs, aphids, or spider mites.
Hoya sigillatis is treasured for its combination of patterned foliage and richly coloured flowers. The Silver cultivar is particularly striking due to the heavy silver mottling, making it a favourite among collectors of rare Hoyas.
Quick Care Summary
Light: Bright, indirect; tolerates soft morning sun
Water: Allow topsoil to dry slightly; avoid soggy soil
Temperature: 1828C; protect below 15C
Humidity: Moderate to high (6080%)
Soil: Chunky, free-draining epiphytic mix
Feed: Monthly in spring/summer; high-potassium for flowers
Growth: Trailing/climbing vine; narrow leaves with silver mottling; clusters of orange-red, fragrant blooms