- Name: Grenache Vintage Pink Hibiscus - Scientific Name: Hibiscus Moscheutos Vintage "Grenache" - Color: Hot Pink - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost - Bloom Time: Summer - Frost - Hardiness Zone: 5 - 11 - Plant Height: 36 - 48" - Plant Spacing: 36" - Light Requirements: Sun - Soil & Water Preferences: Average - Quantity: 25 Seeds - Other: These Hibiscus Have Huge Dinner Plate Sized Flowers That Measure 6” Across. The Plants Begin Blooming While They Are Still Small In Size, & Bloom Heavily All The Way Up Until Frost. Bees & Butterflies Just Love Them! The Luna Hibiscus Is Hardy All The Way To Zone 5. Add A Touch Of The Tropics To Your Landscape!