Overview

Geranium robertianum subsp. maritimum is a clump-forming, mat-forming, trailing, carpet-forming herbaceous perennial in the genus Geranium, part of the Geraniaceae family, with light green, bright green, silvery, dissected, patterned foliage. Geranium robertianum subsp. maritimum grows best in full sun, and tolerates loam soils and neutral pH. Its UK hardiness is rated H5. Suggested uses include borders, cottage gardens, rock gardens, woodland beds and containers.

About

Geranium robertianum subsp. maritimum is a clump-forming and mat-forming perennial cultivar within the Geranium genus, known for its trailing and carpet-forming habit. It features light to bright green, silvery, and dissected foliage, typical of geraniums which have rounded, palmately lobed or divided leaves. This cultivar thrives in full sun on well-drained, neutral loam soil and is hardy to UK zone H5. Suitable for borders, cottage gardens, rock gardens, woodland beds, and containers, it is best grown in sheltered, south-, west-, or east-facing aspects during the summer season.

Growing conditions

Best soil and position for Geranium

Sunlight
Full sun
Soil type
Loam
Soil pH
Neutral
Soil moisture
Well-drained
Aspect
South-facing, West-facing, East-facing
Exposure
Sheltered
UK hardiness
H5

Plant details

Geranium robertianum subsp. maritimum size, habit and characteristics

Plant type
Herbaceous Perennial
Habit
Clump-forming, Mat-forming, Trailing, Carpet-forming
Foliage
Light green, Bright green, Silvery, Dissected, Patterned
Suggested uses
Borders, Cottage gardens, Rock gardens, Woodland beds, Containers

Care notes

Pruning and caring for Geranium robertianum subsp. maritimum

Propagation
Seed, Division, Cuttings
Pest resistance
Aphids, Vine weevil, Caterpillars, Thrips
Disease resistance
Grey moulds

Frequently asked questions

Where is the best place to plant Geranium robertianum subsp. maritimum?

Geranium robertianum subsp. maritimum prefers full sun. It suits sheltered positions.

What soil does Geranium robertianum subsp. maritimum need?

Geranium robertianum subsp. maritimum grows best in loam soil. It prefers neutral soil. Aim for soil that stays well-drained.

Is Geranium robertianum subsp. maritimum hardy in the UK?

Geranium robertianum subsp. maritimum has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.

How do I propagate Geranium robertianum subsp. maritimum?

Seed, Division, Cuttings.

More in the Geranium genus

Browse all Geranium