Rock Soapwort (Saponaria)
Rock Soapwort is a favourite perennial for alpine and rock gardens. This semi-evergreen blooms in June and July. The pink flowers are joined at the base to form a nectar tube that is highly attractive to bees. Try planting spring flowering bulbs beneath it so that their flowers and foliage rise above. The roots really can be used to make soap. Rock Soapwort looks marvelous in containers, but best in situations when it can trail and seed itself. Plant it in rock trough gardens to to grow on a rock wall.
Soil type: well drained