Scarlet Flax
Introduced from North Africa and southern Europe and naturalized across much of the United States by 1900, Scarlet Flax (Linum grandiflorum) produces mounds of brilliant, velvety-red blossoms from May through September. It's a natural fit for cottage gardens, borders, and wildflower or meadow plantings, and its self-sowing habit means it returns reliably each season with no extra effort on your part.