Bistorta amplexicaulis 'Golden Arrow' (syn. Persicaria), Red Bistort or Mountain Fleece

Chartreuse and magenta!!! Himalayan in origin, this one is long-blooming, early summer to mid-autumn. 4-inch long pencil spikes are bright magenta above a thick growth of stem-clasping (amplexicaulis) large, arrow-shaped, chartreuse leaves.

Mature size: 2 – 3 ft T x 1.5 – 2 ft W, clumping. 

Minimum temperature: -30° F