Plant Catalog › Pycnanthemum tenuifolium (Slender Mountain Mint) Pycnanthemum tenuifolium (Slender Mountain Mint) $0.00 Blooms: June through AugustH: 2-3' W: 2-3'Color: White Shades Add To Cart Added! Blooms: June through AugustH: 2-3' W: 2-3'Color: White Shades