Rheum tanguticum is a large, deciduous rhizomatous perennial native from Tibet to North-Central China. It forms a monumental clump about 150 to 250 cm high and wide. Enormous, deeply cut and jagged basal leaves emerge dark Red and Purple in late spring, then mature to deep Green with Red undersides on thick Red stalks. Tall branched stems carry dense Panicles of tiny White, Pink and Red flowers in early summer.
Grow in full sun or partial shade in rich, evenly moist but well-drained clay or loam with Acid or Neutral pH. Give the crown generous space, shelter the huge leaves from drying wind, and mulch with compost to conserve moisture. Avoid stagnant soil because poor drainage can encourage crown rot.
Use this species as an architectural specimen in a large border or near a pond or stream. Remove damaged leaves and cut spent flowering stems after the display if seed is not required. Propagate by division while dormant or from seed. Watch for borers, beetles, rhubarb curculio, crown rot, and leaf spots. The foliage contains high oxalate levels and is harmful if ingested; this ornamental rhubarb must not be presented as edible.