Saxifraga callosa, commonly known as Limestone Saxifrage, is an evergreen perennial plant native to rocky limestone screes and cliffs in Southern Europe. It typically forms clumps reaching 50 cm (20 in) in height and 100 cm (39 in) in width. The plant features rosettes of narrow, grey-green leaves that are often encrusted with lime, contributing to its unique texture and appearance. In spring, Limestone Saxifrage produces long panicles of starry, pure white flowers that are quite showy and attract pollinators.

Limestone Saxifrage is valued for its ornamental qualities, particularly its attractive foliage and bright white blooms. It is a popular choice for rock gardens, alpine houses, and as ground cover in suitable climates. The plant thrives in well-drained alkaline soil and requires full sun exposure to flourish. It is relatively low maintenance but benefits from regular watering during dry periods. Saxifraga callosa has earned the Royal Horticultural Society’s Award of Garden Merit, indicating its exceptional performance in gardens. While it is generally disease-free, it can suffer from root rot if overwatered or planted in poorly drained soils. It is not known to be invasive and does not typically present any significant problems when grown in appropriate conditions.CC BY-SA 4.0