70-77 days to maturity. Iberis amara. Iberis Empress Mixture Seeds. Non-GMO, Annual. Empress Mixture Candytuft seeds are an elegant and timeless plant for any garden. Empress Mixture iberis seeds grow to highlight and accent walkways, borders, fences, and patios, or to invigorate any stale flower bed. Empress Mixture Candytuft seeds are hardy, compact, drought tolerant, and bloom playful ¼ inch lilac, pink, and alpine blossoms all season long. Empress Mixture iberis is native to the Mediterranean and will thrive perennially in moderate and warm winters. Approx 10,000 seeds per ounce.