This grower is fairly sure of this plant identification.
Geranium × oxonianum ‘Winscombe’. Has dense, lobed, mid-green leaves with cup-shaped, dark pink flowers appearing during summer.
They are fully to half hardy. Most species will prefer sun, but some do better in the shade. They will grow in any but waterlogged soil. Outdoors, grow larger species and hybrids in any moderately fertile, well-drained soil. Grow small species and hybrids in humus-rich, sharply drained soil in full sun. Under glass, grow half hardy species in loam-based potting compost with added sharp sand, in bright filtered light. During the growing season, water freely and apply a balanced liquid fertilizer monthly. Water sparingly in winter.
Ground cover, borders
Italics = data drawn from parent genus or species
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