Vaccinium myrtillus aka Bilberry

Vaccinium myrtillus, also known as bilberry or European blueberry, is a holarctic species of shrub with edible fruit of blue color. It has several common names such as blaeberry, wimberry, and whortleberry. Unlike American blueberries, bilberries grow in the original, wild form and have one fruit per twig rather than clusters. They can be planted in USDA plant hardiness zones 3 through 8 as a fruit crop or ground cover, but prefer cooler climates to avoid getting too hot. Bilberries are a super rare houseplant that requires regular watering and well-draining soil. They do best in long-lasting, direct light and should be less than 1 foot from a window. Repotting each time the plant doubles in size should provide sufficient nutrients without the need for added fertilizers.