the honeyberry ("lonicera caerulea") (also known as a blue honeysuckle, sweetberry honeysuckle, fly honeysuckle, blue fly honeysuckle, blue-berried honeysuckle or haskap) is a fruit that is edible. it is a member of the honeysuckle family. it is easy to grow and has few pests. they are native to russia and can tolerate very cold weather. they can survive down to . they have been raised for centuries in asia and eastern europe. honeyberry is a well-behaved plant that is not seen as being an invasive species.