Chalk Milkwort (Polygala Calcarea) is a perennial groundcover in the Polygalaceae family with moderate care difficulty. It requires moderate watering and full sun or partial shade light in USDA hardiness zones 5-8. This plant is safe for cats and dogs.

Polygala calcarea is a delicate, mat-forming evergreen perennial growing to about 5 cm tall and 20 cm broad, with small elliptical leathery leaves and spikes of vivid deep blue flowers in spring.