KRT Melon Cooler. Melon Cooler,” is an indica pot strain made by crossing two dark Flavor. Watermelon produces loosening up results, making it valuable as a tranquilizer or hunger energizer. As the name suggests, this strain has an indisputable fruity watermelon flavor profile, reminiscent of grape with hashy propensities. Watermelon is valued by producers for its high return and intensity, requiring 55 to 60 days blooming time. Producers say this strain has huge, thick buds that are esteemed for their high THC content.