This grower is fairly sure of this plant identification.
I can give the offsets of this plant.
Sempervivum grandiflorum (Houseleek). This is a mat-forming succulent with rosettes of oblong to triangular dark green hairy leaves. The cymes of yellow flowers are borne in early summer to late summer.
You can plant in full sun in a gravelly very well-drained soil.
Grown for its leaves and flowers. Makes ground covering mats, suitable for rock gardens, screens, walls, banks and alpine houses.
Italics = data drawn from parent genus or speciesView Full Plant Finder Record