Gaumer's chastetree Plant Care

Gaumer's chastetree (Vitex gaumeri) belongs to the Lamiaceae family within the Vitex genus. Gaumer's chastetree is native to Belize, Guatemala, Honduras, and Mexico. Gaumer's chastetree is also known as Vitex gaumeri var. hondurensis.

Gaumer's chastetree displays a small tree or large shrub growth habit, reaching up to 15 ft tall with a spread of approximately 10 ft. Gaumer's chastetree produces showy spikes of purple, blue, or white flowers.

Leaf size: approximately 4 inches.

Water a young or newly planted Gaumer's chastetree 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.

Gaumer's chastetree thrives in full sun to partial shade.

Vitex gaumeri tolerates temperatures of 50–90°F. Gaumer's chastetree prefers humidity levels of 40–70%.

Well-draining loamy soil with added compost for nutrients. Good drainage is essential for Gaumer's chastetree to prevent waterlogging, which leads to root rot and fungal issues.

Feed Gaumer's chastetree 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 loamy soil with added compost for nutrients. Avoid low spots where water collects after rain.

Gaumer's chastetree is suited to USDA Zone 10b – 12b.

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.

Gaumer's chastetree can spread to about 10 ft (3 m) and reach about 15 ft (5 m) tall. Space plants about 10 ft (3 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 Gaumer's chastetree 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.

Gaumer's chastetree 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.

Gaumer's chastetree can be propagated through softwood cuttings, hardwood cuttings.

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

Gaumer's chastetree is susceptible to aphids, spider mites, whiteflies. 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.

Gaumer's chastetree grows outdoors in USDA Zone 10b – 12b. It survives winters down to planting zone 10b. Gaumer's chastetree is native to Belize, Guatemala, Honduras, and Mexico. In cooler regions, grow Gaumer's chastetree as a houseplant or bring it indoors before the first frost.