Thread-stem Broom Plant Care

Thread-stem Broom (Cytisus filipes) belongs to the Fabaceae family within the Cytisus genus. Thread-stem Broom is native to the Canary Islands.

Thread-stem Broom displays an upright, branching shrub growth habit, reaching up to 5 ft tall with a spread of approximately 4 ft. Thread-stem Broom produces showy pea-like flowers in shades of yellow, pink, or purple.

Leaf size: approximately 1.5 inches.

Water a young or newly planted Thread-stem Broom 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.

Thread-stem Broom thrives in full sun to partial shade.

Cytisus filipes tolerates temperatures of 50–80°F. Thread-stem Broom prefers humidity levels of 40–60%.

Well-draining sandy loam with added organic matter. Good drainage is essential for Thread-stem Broom to prevent waterlogging, which leads to root rot and fungal issues.

Feed Thread-stem Broom 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. Avoid low spots where water collects after rain.

Thread-stem Broom is suited to USDA Zone 12a.

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.

Thread-stem Broom can spread to about 4 ft (1.2 m) and reach about 5 ft (2 m) tall. Space plants about 4 ft (1.2 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 Thread-stem Broom 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.

Thread-stem Broom is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Thread-stem Broom can be propagated through seeds, semi-hardwood cuttings. Similar propagation techniques also apply to scotch broom plant care, which shares the same genus.

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

Thread-stem Broom is susceptible to aphids, spider mites, caterpillars. 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.

Thread-stem Broom grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Thread-stem Broom is native to the Canary Islands. In cooler regions, grow Thread-stem Broom as a houseplant or bring it indoors before the first frost.