Cambridge Blue Cranesbill

Geranium x cantabrigiense 'Cambridge Blue' (Geranium x cantabrigiense 'Cambridge Blue') is a refined, beautifully floriferous hardy geranium — a hybrid cross between Geranium macrorrhizum and Geranium dalmaticum — celebrated for its delicate, saucer-shaped blooms in soft rose-pink with a subtle cool bluish tinge that gives this cultivar its evocative, quietly poetic name. Produced in generous abundance on slender wiry stems above a dense, low mound of deeply lobed, aromatic semi-evergreen foliage, the flowers carry a gentle, cottage-garden quality that brings naturalness and grace to borders and woodland edges alike. In autumn, the attractive lobed foliage turns warm shades of burnt orange and russet-red, extending the plant's ornamental value well beyond its spring and early summer bloom season for genuine three-season garden presence.

This professional-grade 4" plant arrives with a robust, well-established root system cultivated through professional horticultural practices — ready to settle quickly and spread into its characteristic low, weed-suppressing mound. 'Cambridge Blue' is among the most versatile and garden-friendly hardy geraniums available — equally excellent as a ground cover beneath shrubs and trees, as refined front-of-border edging, or as a naturalizing filler in mixed perennial plantings. It spreads gradually to form a dense, weed-suppressing mat without ever becoming aggressive — a genuinely well-behaved, low-maintenance performer that earns its place through consistent, multi-season beauty.

• Delicate Rose-Pink Blooms with a Cool Bluish Tinge: Softly colored, saucer-shaped flowers in rose-pink with a subtle cool blue hue create a sophisticated, romantic effect in cottage gardens, woodland borders, and mixed perennial plantings — a distinctive, refined floral character that sets 'Cambridge Blue' apart from all other hardy geranium cultivars.
• Three-Season Ornamental Interest: Spring and early summer flowers give way to aromatic, deeply lobed foliage through the summer months, then vivid burnt orange and russet autumn color — delivering genuine ornamental value across three full seasons and ensuring this plant earns its garden space year-round.
• Excellent Dense Ground Cover: Forms a gradually spreading, densely woven, weed-suppressing mat of aromatic semi-evergreen foliage — ideal for underplanting shrubs and trees, covering shaded slopes, and filling the awkward gaps in mixed borders where few other ornamentals perform with consistent quality.
• Shade & Part-Shade Tolerant: One of the most adaptable hardy geraniums for lower-light conditions — 'Cambridge Blue' thrives in dappled shade, woodland edges, and the dry shade beneath established trees where a reliable, attractive ground cover is needed and most flowering ornamentals decline.
• Deer & Rabbit Resistant: The strongly aromatic foliage naturally deters browsing deer and rabbits — keeping the plant's attractive, dense foliage mound consistently intact through the entire growing season without extra effort or chemical intervention.

These 4" healthy live plants thrive in full sun to partial shade with average to well-drained soil; tolerates dry shade once well established. Water regularly during establishment, then reduce to moderate supplemental irrigation. USDA Hardiness Zones 5–8; mature height: 10–14 inches in bloom; spread: 18–24 inches. Bloom time: late spring through early summer, with sporadic rebloom possible in mild climates. Trim back lightly after the main flowering flush to refresh the foliage and encourage a tidy, compact habit through the remainder of the season.