240 Days to maturity. Saponaria ocymoides. Rock Soapwort Saponaria Seeds. Non-GMO, perennial. A great spreading ground cover that can be grown from seed. Easy to grow plant spreads to 16 inches across; it blooms in late spring and early summer with loads of small pink flowers. Tolerant of all kinds of soils. Naturalizes easily and self-reseeding. Rock soapwort is a fantastic spreading ground cover choice with adorable blossoms! ~200,000 seeds/oz.