Spectacular Senna Plant Care

Spectacular Senna (Senna spectabilis) belongs to the Fabaceae family within the Senna genus. Spectacular Senna is native to South and Central America. Spectacular Senna is also known as Cassia, Golden Cassia, Cassia spectabilis.

Spectacular Senna displays an upright, spreading shrub growth habit, reaching up to 5 ft tall with a spread of approximately 5 ft. Spectacular Senna produces bright yellow, pea-like flowers in clusters.

Leaf size: approximately 4 inches.

Water a young or newly planted Spectacular Senna 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.

Spectacular Senna thrives in full sun to partial shade.

Senna spectabilis tolerates temperatures of 60–85°F. Spectacular Senna prefers humidity levels of 40–70%.

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

Feed Spectacular Senna 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.

Spectacular Senna is suited to USDA Zone 13a.

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.

Spectacular Senna can spread to about 5 ft (1.5 m) and reach about 5 ft (2 m) tall. Space plants about 5 ft (1.5 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 Spectacular Senna 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.

Spectacular Senna 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.

Spectacular Senna can be propagated through seeds, softwood cuttings.

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

Spectacular Senna is susceptible to aphids, caterpillars, spider mites. 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.

Spectacular Senna grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Spectacular Senna is native to South and Central America. In cooler regions, grow Spectacular Senna as a houseplant or bring it indoors before the first frost.