Q. What are some good companion plants to grow with Rudbeckia?
Some good companion plants to grow with Rudbeckia are Artemisia, aster, grasses, Helianthus, Boltonia, chrysanthemum, Eupatorium rugosum 'Chocolate', Solidago x Solidaster, Helenium, Crocosmia, Salvia, Eryngium, and Dahlia 'David Howard'.
Some Rudbeckias to try: Rudbeckia occidentalis 'Green Wizard' is considered a curiosity--petals barely visible, dark blackish brown conical disk, 2 inches. A RHS-awarded Rudbeckia is R. laciniata 'Goldquelle' (syn. 'Golden fountain') 2 1/2-4 feet high x 2 feet wide, hardy to zones 3-10, with mid-green deeply cut foliage. R. laciniata 'Herbstsonne' (syn. 'Autumn Sun') can grow 5-7 feet high x 2 feet wide, with a bright yellow, conical green disk and 4-5-inch flowers. May need support, but long-blooming. RHS Award. R. Maxima is 4-8 feet high x 2 feet wide, hardy to zones 4-10, has drooping yellow florets, brownish black 2-inch disk, 3-5-inch flowers. Foliage is glaucous, ovate to elliptic, smooth. Good foliage plant, erect growth.
Rudbeckia fulgida var. sullivantii 'Goldsturm' can be invasive.
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- Courtesy of NYBG Plant Information Service