- Name: Royal Poinciana Tree - Other Common Names: Flamboyant Tree / Flame Tree / Peacock Flower - Scientific Name: Delonix Regia Syn. Poinciana Regia - Color: Red - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost - Bloom Time: Late Winter - Early Spring / Early Summer (Varies Based On Climate Where Grown) - Hardiness Zone: 10 - 12 - Plant Height: 20 - 40' - Plant Spacing: 20 - 40' - Light Requirements: Sun - Soil & Water Preferences: Average - Quantity: 10 Seeds