Coyotillo Plant Care

Coyotillo (Karwinskia humboldtiana) belongs to the Rhamnaceae family within the Karwinskia genus. Coyotillo is native to southern and western Texas in the United States as well as much of Mexico. Coyotillo is also known as Mexican Blueberry, Humboldt's Karwinskia.

Coyotillo displays a small tree or shrub growth habit, reaching up to 10 ft tall with a spread of approximately 8 ft. Coyotillo produces small clusters of white or pink flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Coyotillo every 7–14 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.

Coyotillo thrives in full sun to partial shade.

Karwinskia humboldtiana tolerates temperatures of 50–90°F. Coyotillo prefers humidity levels of 40–70%.

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

Feed Coyotillo 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 soil mix with added organic matter for nutrients. Avoid low spots where water collects after rain.

Coyotillo 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.

Coyotillo can spread to about 8 ft (2.4 m) and reach about 10 ft (3 m) tall. Space plants about 8 ft (2.4 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 Coyotillo 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.

Coyotillo 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.

Coyotillo can be propagated through seeds, hardwood cuttings.

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

Coyotillo is susceptible to aphids, scale insects, 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.

Coyotillo grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Coyotillo is native to southern and western Texas in the United States as well as much of Mexico. In cooler regions, grow Coyotillo as a houseplant or bring it indoors before the first frost.