A new and distinct cultivar of geranium plant named `Grasalm` particularly characterized by the combined features of deep pink to rose-red, single-type, star-shaped flowers; medium-sized, semi-spherically shaped inflorescence, high above the foliage; medium-sized, robust, fan-shaped leaves with strong zonation; medium to wide, well-branched and dense plant habit; and floriferous with very early spring flowering response.