Zonal Geranium

Scientific Name: Pelargonium x hortorum

Plant Family: Geraniaceae

Native Region: South Africa (parent species); globally cultivated

Zonal Geranium

Brief Description

A popular flowering plant known for its circular, ruffled leaves that often feature a distinct dark, horseshoe-shaped 'zone' or band of color. They produce clusters of flowers on long stalks.

Care Instructions

Provide plenty of light and well-draining soil. Water when the top inch of soil feels dry, and feed with a balanced fertilizer every 2-4 weeks during the growing season. Deadhead spent blooms to encourage new growth.

Medicinal Value

We do not currently provide medicinal value for plant identifications.

Sunlight

Full sun to partial shade; at least 6 hours of direct sunlight daily for best blooming.

Watering

Moderate watering. Allow the soil to dry out slightly between waterings. Drought-tolerant once established but prone to root rot if overwatered.

Soil

Well-draining, loamy soil with a slightly acidic to neutral pH (6.0 to 7.0).

Hardiness Zone

USDA zones 10-11 (grown as annuals elsewhere or brought indoors for winter).

Growth Habit

Perennial herb (usually grown as an annual); upright, mounding habit reaching 1-3 feet tall and wide.

Bloom Season

Spring through fall; produces umbrella-like clusters (umbels) of flowers in red, pink, white, or orange.

Toxicity

Mildly toxic to dogs, cats, and horses if ingested; may cause vomiting, depression, and dermatitis due to geraniol and linalool content.

Propagation

Easily propagated by stem cuttings taken in spring or summer, or by seed.

Common Pests & Issues

Susceptible to aphids, spider mites, whiteflies, and fungal issues like botrytis (gray mold) or rust if air circulation is poor.

Similar Species

Ivy Geranium (Pelargonium peltatum), which has a trailing habit and ivy-like leaves, and Scented Geraniums (various Pelargonium spp.), which are grown for fragrant foliage.

Interesting Facts

The 'zone' on the leaves becomes more pronounced with higher light levels. Despite their common name, they are not true members of the Geranium genus, which includes the hardy cranesbills.

Created At: 2026-05-01T11:24:40.113447