Rose Mallow Flower Seeds - 4 Oz - Lavatera trimestris Non-GMO - Open Pollinated - High Germination Rate Seeds For: Flower Gardening Days to Full Maturity: 63 -- Annual -- Perennial -- USDA Hardiness Zone: 7-10 Mountain Valley Seed Company Brand – Premium quality seeds for your garden. Wildflower seeds throw and grow anywhere! Ethically sourced, non-GMO, and ideal for wildflower gardens, pollinator habitats, and vibrant landscapes. Rose Mallow Wildflower Seeds. Lavatera trimestris. Rose Mallow is an Annual, erect shrub that grows 2 to 3 feet high. Color ranges from white to red, but more commonly rose-pink. Open cup shaped flowers somewhat resembling hibiscus. Will tolerate very wet conditions. Sun or shade.