Slender Mountain Mint (Pycnanthemum tenuifolium), 2000 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 3 tall native perennial mint with dense clusters of small white flowers. A summer flowering plant that grows well in dry to wet soils and in full sun or part shade.