Bright red stems, quick growing, can be harvested after the first year.
General information:
Rhubarb
Rheum rhabarbarum
Perennial from cooler parts of Asia. Large and leafy to 1m, harvest outside stems as required, eaten cooked as desert with apples, likes to be well watered and fertilized. Leaves have oxalic acid so don't eat them. Shade tolerant, multiplies by separation. Sow spring, summer.