- Up for sale is purple rose of sharon, hibiscus syriacus. 50 seeds. - This rose of sharon's hallmark feature is its trumpet-shaped, late summer blooms of grace and color. Each sumptuous, 4" blossom features delicate purple petals surrounding a dramatic red throat with a bold bush of yellow stamens. - The glossy, dark-green foliage frames the flowers to perfection for a garden display that stands out amid other plantings. - Unlike other hibiscus varieties that put on a show and then retire for the season, rose of sharon will flower again and again for a spectacular display late summer in to fall. - She grows in a tight bush 6-10' tall and 6'+ wide. - Perennial bush. - Zone: 5-9. - Sun: full sun is best. - Water: regular. - Soil: rich, well draining soil. - Height: 6-10' tall. - Bloom time: late summer. August to september.