These filler flowers are part of the immense compositae family, which includes Pompoms, Sunflowers and Dahlias. Solidago features thin, wiry stems with many sprays of flowers and deep green foliage. The flowers tend to be quite hardy, but can exhibit damage due to poor growing or storage. Check flowers for any damage, as well as the leaves for yellowing. Remove all foliage that will fall below the water-line. Cut stems and place the flowers in a low sugar holding solution. Hold in coolers.