On Jul 20, 2002, lupinelover from Grove City, OH (Zone 6a) wrote:
Even though this is technically an annual plant, it maintains a permanent presence by self-sowing year-round. Foliage is remarkably similar to the more common perennial woodruff, but airy purple flowers almost any time during growing season. Plant is fully hardy, surviving below 0 in winter. Seedheads are very attractive; resemble small cotton bolls. Once seed is set, plant dies, but new ones are constantly growing.