This grower is fairly sure of this plant identification.
Hardy pink geranium.
Pyrenean cranesbill, Endress's geranium, French cranesbill
Geranium endressi (Pyrenean cranesbill). This perennial species will produces pink flowers in early summer and deeply divided foliage, it will form clumps about 45cm high and 60cm across.
They will need shelter from intense heat of the afternoon sun.
Ground cover, border, edging. Spring/Summer interest.
Italics = data drawn from parent genus or speciesView Full Plant Finder Record