Thalictrum rochebrunianum Giant Meadow Rue
A tall, slender species that is native to Japan. Produces delicate, fern-like, bluish-green foliage and clusters of pendulous, lavender flowers with yellow stamens, held on erect, purple stems (the plant does not require staking) followed by attractive purple seedheads. Flowering July to August. Height 180 cm. Moist, humus rich, well-drained soil in full sun to part shade.