- Name: Florida Giant Watermelon - Other Common Names: Cannon Ball Watermelon / Black Diamond Watermelon - Scientific Name: Citrullus Lanatus - Color: Dark Green Rinds / Bright Red Flesh / Yellow Flowers - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost - Harvest: 90 Days - Plant Height: 6 - 12" - Plant Spacing: 2 - 3 Plants Per Hill Spaced 60 - 72" Apart - Light Requirements: Sun - Soil & Water Preferences: Average - Quantity: 50 Seeds - Other: Florida Giants Are Huge 40-50 Pound Round Watermelons With Firm, Sweet, Juicy Flesh. They Grow Quickly, Reaching Their Enormous Size In Just 90 Days. Their Seeds Are Also Larger Than Those Of ‘Normal’ Watermelons, So They Are Easier To Remove. This Watermelon Will Also Attract Bees, Birds, & Butterflies To Your Garden.