Alyssum, Snow Crystals

Snow Crystals changed everything. It was the first tetraploid Sweet Alyssum, which means that it has twice the chromosomes of older (diploid) varieties. Twice the chromosomes means LOTS more vigor, as well as specific improvements such as much greater heat and wind tolerance, larger flower size, and longer staying power. Suddenly you could create edging or even groundcover with Sweet Alyssum, because Snow Crystals all reach the same size, bloom at the same time, and stay put in all their glory for months, not weeks.