Warm, friendly, big and strong, giant hibiscus 'Grandpa' blooms with huge 8-10" single flowers in rings of light orange, vivid orange and pink around a small red eye. 'Grandpa' is the child of giant orange mother 'Radiant' and tried and true red, yellow and pink father 'Flamboyant.' The bush is very upright, medium sized, and the flowers present beautifully on all sides. Released from HVH in 2019. Hybridizer: C. Black