Hardy geraniums, commonly known as cranesbills, belong to the Geranium genus, and many species within this genus are found in the UK. Here’s a general description of hardy geraniums in the UK:

Botanical Characteristics:

Leaves: Hardy geraniums typically have deeply lobed, palmate leaves. The foliage can be quite ornamental and may change color throughout the growing season, adding to the plant’s overall attractiveness.

Flowers: The flowers of hardy geraniums vary in color, including shades of pink, purple, blue, and white. They are often saucer-shaped and have five petals. The flowers appear in spring or early summer, and some varieties may produce sporadic blooms throughout the growing season.

Habit: These plants exhibit a spreading or clumping habit, depending on the species or cultivar. They are generally low-growing, making them suitable for ground cover or border plantings.

Height: Heights can vary among different species and cultivars, but they typically range from 6 inches to 2 feet (15 to 60 cm).

Hardiness: As the name suggests, hardy geraniums are well-suited to the UK climate. They are perennials and can withstand colder temperatures, returning year after year.

Cultural Requirements:

Sunlight: Hardy geraniums prefer partial to full sun, although some varieties can tolerate shade. They are versatile and can adapt to different light conditions.

Soil: Well-drained soil is essential for hardy geraniums. They are not overly demanding in terms of soil fertility but thrive in soil that doesn’t stay consistently waterlogged.

Watering: While they are relatively drought-tolerant once established, regular watering during dry spells is beneficial, especially for optimal flowering.

Pruning: Trimming back the plants after the first flush of flowers can encourage a second bloom and help maintain a tidy appearance. In some cases, deadheading spent flowers can also promote additional blooms.

Popular Varieties:

Geranium ‘Rozanne’: Known for its long blooming period and vibrant blue-purple flowers.

Geranium sanguineum (Bloody Cranesbill): Native to the UK, it has magenta-colored flowers and deeply cut leaves.

Geranium macrorrhizum (Bigroot Geranium): Features fragrant foliage and pink to purple flowers. It is often used for ground cover.

These are just a few examples, and there are numerous other hardy geranium varieties available, each with its unique characteristics. Hardy geraniums are appreciated for their easy care, adaptability, and the burst of color they bring to gardens throughout the growing season.