Alphabetical Plant Listing

Pelargonium (Geranium)

Pelargonium, Geranium, Zonal Geranium, Ivy-leaved Geranium, Regal Geranium, Angel Geranium, Scented Geranium


What is Geranium (Pelargonium)?

Pelargonium, commonly known as geranium, is a genus of flowering plants that includes over 200 species native to South Africa. These plants are popular for their showy flowers, fragrant foliage, and versatility in gardens and containers.

Growth Habit: Geraniums have a wide range of growth habits, from compact and bushy to trailing and climbing. They typically produce rounded, lobed, or dissected leaves, often with a distinct aroma when crushed.

Size: Depending on the species and cultivar, they can vary greatly in size. Dwarf varieties can grow as small as 6 inches (15 cm) tall, while larger types can reach up to 2 feet (60 cm) in height.

Flowers: Geranium flowers are cherished for their vibrant, colorful flowers that bloom in shades of red, pink, purple, white, and bicolor combinations. The flowers are borne in clusters called umbels, with individual blooms varying from single to double forms. Flowering typically occurs from spring to fall, with some species blooming almost year-round in mild climates.

Hardiness: Geranium plants are generally considered tender perennials, with most species and cultivars being hardy in USDA zones 9-11. They can be grown as annuals in colder regions or overwintered indoors.

Uses: Geraniums are versatile plants that can be grown in containers, hanging baskets, window boxes, or planted directly in the garden. They are ideal for borders, edging, rock gardens, and mixed plantings with other sun-loving plants.

Mosquito repellent: Some varieties are known for their ability to repel insects, such as mosquitoes, and are often grown near outdoor living spaces to help deter pests.

Toxicity: Geranium is considered non-toxic to humans but can cause mild irritation if ingested in large quantities. Some species can be toxic to pets, causing gastrointestinal upset if ingested.

Edible: The leaves of some species are edible and can be used to flavor desserts, teas, and other dishes.

Guide Information

Hardiness 9 - 12
Climate Zones 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Annuals, Perennials
Plant Family Pelargonium - Geranium
Exposure Full Sun, Partial Sun
Season of Interest Summer (Early,Mid,Late)
Fall
Height 6" - 2' (15cm - 60cm)
Spread 6" - 2' (15cm - 60cm)
Water Needs Low, Average
Maintenance Low
Soil Type Loam, Sand
Soil pH Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Showy, Evergreen
Tolerance Drought
Landscaping Ideas Beds and Borders, Hanging Baskets, Patio and Containers
Garden Styles City and Courtyard, Informal and Cottage

 Lena Ivashkevich, Shutterstock

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.

Guide Information

Hardiness 9 - 12
Climate Zones 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Annuals, Perennials
Plant Family Pelargonium - Geranium
Exposure Full Sun, Partial Sun
Season of Interest Summer (Early,Mid,Late)
Fall
Height 6" - 2' (15cm - 60cm)
Spread 6" - 2' (15cm - 60cm)
Water Needs Low, Average
Maintenance Low
Soil Type Loam, Sand
Soil pH Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Showy, Evergreen
Tolerance Drought
Landscaping Ideas Beds and Borders, Hanging Baskets, Patio and Containers
Garden Styles City and Courtyard, Informal and Cottage
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