Tree Seaside Sunflower Plant Care

Tree Seaside Sunflower (Borrichia arborescens) belongs to the Asteraceae family within the Borrichia genus. Tree Seaside Sunflower is native to the Yucatán Peninsula, Cuba, Jamaica, Bahamas, Cayman Islands, Hispaniola, Puerto Rico, Bermuda, the Florida Keys, and other islands in the region. Tree Seaside Sunflower is also known as Sea Oxeye, Anthemis crassifolia, Borrichia arborescens.

Tree Seaside Sunflower displays a low spreading groundcover growth habit, reaching up to 0.5 ft tall with a spread of approximately 1.5 ft. Tree Seaside Sunflower produces small yellow daisy-like flowers.

Leaf size: approximately 2 inches.

Water a young or newly planted Tree Seaside Sunflower every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Tree Seaside Sunflower thrives in full sun to partial shade.

Borrichia arborescens tolerates temperatures of 50–85°F. Tree Seaside Sunflower prefers humidity levels of 40–70%.

Well-draining sandy soil with added organic matter. Good drainage is essential for Tree Seaside Sunflower to prevent waterlogging, which leads to root rot and fungal issues.

Feed Tree Seaside Sunflower every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs 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 soil with added organic matter. Avoid low spots where water collects after rain.

Tree Seaside Sunflower is suited to USDA Zone 10a – 11b.

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

Tree Seaside Sunflower can spread to about 2 ft (0.5 m) and reach about 1 ft (0 m) tall. Space plants about 2 ft (0.5 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 plant spacing calculator.

Prune Tree Seaside Sunflower 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 shrub in one year.

Tree Seaside Sunflower is frost-tender (hardy to USDA zone 10). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Tree Seaside Sunflower can be propagated through seeds, division. Similar propagation techniques also apply to sea oxeye daisy plant care, which shares the same genus.

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

Tree Seaside Sunflower is susceptible to aphids, whiteflies, 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.

Tree Seaside Sunflower grows outdoors in USDA Zone 10a – 11b. It survives winters down to planting zone 10a. Tree Seaside Sunflower is native to the Yucatán Peninsula, Cuba, Jamaica, Bahamas, Cayman Islands, Hispaniola, Puerto Rico, Bermuda, the Florida Keys, and other islands in the region. In cooler regions, grow Tree Seaside Sunflower as a houseplant or bring it indoors before the first frost.