Rudbeckia Also called gloriosa daisy (Rudbeckia sp.) Large, single, daisy-like flowers on stalks 18 to 24 inches tall. Flowers have brown centers with yellow, orange, or bronze petals. Soil and Light Full sun, but can tolerate partial shade. Well-drained soil. Planting Sow seed in late fall or early spring outdoors. Plants often self-sow. Comments Trim back flowers to encourage new growth. Cut flowers for fresh arrangements.