This grower is fairly sure of this plant identification.
Astrantia carniolica ‘Rubra’ (Masterwort). This plant is slender and grows up to 60cm long. Its flowers are silver tinted pink.
They are fully hardy and will need sun or semi-shade with well drained soil.
Used in flower arrangements or can be used in borders.
Italics = data drawn from parent genus or speciesView Full Plant Finder Record