105-112 days to maturity. Dianthus chinensis x barbatus. Dianthus Telstar Mix Seeds. Non-GMO, Annual or Biennial. Ornamental. Telstar Mix dianthus seeds boast elegant 1-2 inch blooms to reinvigorate any stale garden this summer. Telstar Mix dianthus seeds are easy to grow, heat tolerant, and irresistible to hummingbirds, butterflies, and other important pollinators. Telstar Mix dianthus seeds are an ideal plant to cascade from hanging baskets, planters, and window boxes. Dianthus is one of the most cultivated flowers in the entire world and Telstar Mix promises the boldest pinks available. Pelleted Seeds.