Superbells Double Twilight from PROVEN WINNERS displays small lavender flowers with a yellow eye all season. Abundant, small petunia-like flowers bloom from planting until the first frost. It is heat tolerant, does not require deadheading, and is heat tolerant. Fertilize-weekly with PROVEN WINNERS Water Soluble Plant Food for best performance. We exclusively grow our annual grandes in Eco+Grandes for a greener tomorrow! Plant Powered Packaging by PROVEN WINNERS: Introducing the full annual Eco+Grande collection. The Eco+Grande is a game changing Plant Container made from plants. This compostable container is made from starchy renewable plants like corn, switch grass and sugar beets grown in the United States. The Eco+Grande has nutrients built into the wall of the container that helps plants grow bigger and faster all season, if planted in the ground. When the PROVEN WINNERS Eco+Grande container is discarded in the garbage can, it will naturally break down faster in a landfill than a traditional petroleum made container. The container will get smaller and smaller until microbes consume it, turning it back into an inert organic product.