Corynaea crassa Plant Care

Corynaea crassa (Corynaea crassa) belongs to the Balanophoraceae family within the Corynaea genus. Corynaea crassa is native to South and Central America.

Corynaea crassa displays a low rosette, clumping growth habit, reaching up to 1.5 ft tall with a spread of approximately 1.5 ft. Corynaea crassa produces small inconspicuous flowers in dense spikes.

Leaf size: approximately 8 inches.

Water a young or newly planted Corynaea crassa every 7–10 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.

Corynaea crassa thrives in filtered sunlight or partial shade. Avoid placing Corynaea crassa in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Corynaea crassa tolerates temperatures of 60–80°F. Corynaea crassa prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Humus-rich, well-draining soil mix with high organic content. Good drainage is essential for Corynaea crassa to prevent waterlogging, which leads to root rot and fungal issues.

Feed Corynaea crassa 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 filtered sunlight or partial shade and humus-rich, well-draining soil mix with high organic content. Avoid low spots where water collects after rain.

Corynaea crassa is suited to USDA Zone 13a.

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.

Corynaea crassa can spread to about 2 ft (0.5 m) and reach about 2 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 Corynaea crassa 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.

Corynaea crassa 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.

Corynaea crassa can be propagated through seeds, rhizome division.

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Corynaea crassa is susceptible to mealybugs, scale insects. 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.

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