Achillea ptarmica, The Pearl Superior, commonly known as Yarrow, is a striking 24" inch tall ball shaped perennial plant that features glorious single and double petal, star white pom-pom bloom sprays on clustered bracts. Winter hardy to zone 3, this popular low maintenance variety is an excellent addition to garden bed plantings, borders and to add breaks between colorful groupings. This variety is also grown as a cut flower variety and used both fresh and dried. Fast to flower in just 90 days from seed, The Pearl Superior is an excellent choice for nursery growers who feature color packs. Awarded the RHS Award of Garden Merit, Achillea ptarmica, ‘The Pearl’ , was awarded the Royal Horticultural Society’s Award of Garden Merit (AGM) in 1999. Packet: 50 seeds.