Rubia tinctorum has been in cultivation far longer than most ornamental plants, valued not for its flowers but for the rich red dye that can be extracted from its roots. Native to Eurasia, it is a herbaceous perennial in the coffee family that climbs by tiny recurved hooks on its leaves and stems, scrambling through neighboring vegetation the way a climber uses holds on a rock face. The stems reach 2 to 3 feet and the plant is hardy in zones 5 through 9.

In contemporary gardens it occupies a niche somewhere between useful and curious, finding its place in dye gardens, cottage herb plantings, and historically informed kitchen gardens. It grows without fuss in ordinary well-drained soil and does not demand much attention once established. The flowers are small and easily overlooked, but the root, which must be several years old before it yields useful quantities of pigment, turns a burnt orange-red that has colored textiles from ancient Egypt to medieval Europe.