Glandora diffusa, commonly known as Purple Gromwell, is an evergreen perennial herb native to the rocky, limestone areas and scrublands of the Mediterranean and Northern Spain. It typically grows to 15 cm (6 in) tall and can spread 60 cm (24 in) or more, featuring dark green, hairy evergreen leaves. From late spring to early summer, it produces masses of striking blue or occasionally white 5-lobed flowers that are highly attractive to pollinators. The plant forms a low, mat-like ground cover, making it an excellent choice for rock gardens, alpine gardens, and as a front-of-border plant.

Purple Gromwell is valued for its drought tolerance and showy flowers, which add a splash of color to the garden. It is hardy down to −15 °C (5 °F) (USDA zones 6 - 8), and thrives in a position with full sun exposure. The plant requires well-drained, preferably alkaline to neutral soil, and is susceptible to root rot if kept too moist. It also needs a period of cold temperatures (vernalization) to initiate flowering. While generally low-maintenance, it may suffer from slug and snail damage, and in some regions, it can be prone to powdery mildew.CC BY-SA 4.0