Poor Joe Plant Care

Poor Joe (Diodella teres) belongs to the Rubiaceae family within the Diodella genus. Poor Joe is native to Mexico, Central America, South America, the West Indies and the United States from California to Florida and from Kansas to Massachusetts. Poor Joe is also known as Field Buttonweed.

Poor Joe displays a compact, mounding shrub growth habit, reaching up to 2.5 ft tall with a spread of approximately 3 ft. Poor Joe produces small, tubular white flowers in clusters.

Leaf size: approximately 4 inches.

Water a young or newly planted Poor Joe 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.

Poor Joe thrives in bright indirect light. Avoid placing Poor Joe in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Diodella teres tolerates temperatures of 65–80°F. Poor Joe prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.

Rich, well-draining soil with high organic matter content. Good drainage is essential for Poor Joe to prevent waterlogging, which leads to root rot and fungal issues.

Feed Poor Joe 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 bright indirect light and rich, well-draining soil with high organic matter content. Avoid low spots where water collects after rain.

Poor Joe is suited to USDA Zone 5a – 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.

Poor Joe can spread to about 3 ft (0.9 m) and reach about 3 ft (1 m) tall. Space plants about 3 ft (0.9 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 Poor Joe 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.

Poor Joe is hardy down to USDA zone 5a, so once established it can stay outdoors through winter in that zone and warmer ones.

Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.

Young and container-grown shrubs need extra protection: roots in a pot freeze much more easily than roots in the ground.

Poor Joe can be propagated through seeds, stem cuttings.

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

Poor Joe is susceptible to aphids, spider mites, 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.

Poor Joe grows outdoors in USDA Zone 5a – 11b. It survives winters down to planting zone 5a. Poor Joe is native to Mexico, Central America, South America, the West Indies and the United States from California to Florida and from Kansas to Massachusetts.