Holoregmia viscida Plant Care

Holoregmia viscida (Holoregmia viscida) belongs to the Martyniaceae family within the Holoregmia genus.

Holoregmia viscida displays a tall, upright shrub growth habit, reaching up to 5 ft tall with a spread of approximately 3 ft. Holoregmia viscida produces large trumpet-shaped blooms in shades of purple and white.

Leaf size: approximately 8 inches.

Water a young or newly planted Holoregmia viscida every 7–10 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Holoregmia viscida thrives in full sun to partial shade.

Holoregmia viscida tolerates temperatures of 65–80°F. Holoregmia viscida prefers humidity levels of 40–60%.

Well-draining sandy loam with added organic matter for moisture retention. Good drainage is essential for Holoregmia viscida to prevent waterlogging, which leads to root rot and fungal issues.

Feed Holoregmia viscida every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Choose a spot with full sun to partial shade and well-draining sandy loam with added organic matter for moisture retention. Avoid low spots where water collects after rain.

Holoregmia viscida is suited to USDA Zone 13b.

Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.

Holoregmia viscida can spread to about 3 ft (0.9 m) and reach about 5 ft (2 m) tall. Space plants about 3 ft (0.9 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the tree spacing calculator.

Prune Holoregmia viscida while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the tree in one year.

Holoregmia viscida is frost-tender (hardy to USDA zone 13). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Holoregmia viscida can be propagated through seeds, division of offsets.

See all plants toxic to cats and plants toxic to dogs.

Holoregmia viscida is susceptible to aphids, spider mites, whiteflies. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Holoregmia viscida grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. In cooler regions, grow Holoregmia viscida as a houseplant or bring it indoors before the first frost.