Pennsylvania Smartweed (Polygonum pensylvanicum), 200 Certified Pure Live Seed, True Native Seed FREE SHIPPING Number of seed is Pure Live Seed, not bulk Species is US Native, not introduced alien We grow the seed so we control quality A 2 to 5 tall native annual with short spikes of small pink flowers. A spring and early summer flowering plant requiring med to wet soils and preferring full sun sites.