Basal leaves appear in early spring and flowering stalks begin their ascent in June, reaching five to six feet and full flower by August, often staying in bloom into September. 'Henry Eilers' has finely quilled flowers of true yellow, not gold, and is stunning in a mass planting. Rudbeckia subtomentosa are excellent back-of-the-border plants, the blooms are long-lasting, attractive to butterflies and great cut flowers. 'Henry Eilers' pairs well with ornamental grasses and tall varieties of New England Asters.