Answer: Most rudbeckia varieties don't begin blooming until mid July or later but then continue for a long period. For example, the Black-Eyed Susan or Goldstrum types are among the first to bloom and the Rudbeckia hirta varieties begin in August but continue until frost. As with any perennials, there is always a bit of variation on the bloom schedule from plant to plant due to subtle variations in growing conditions and a certain amount of variability in seed grown stock. As long as the plants are healthy, I suspect it is merely a question of time and they should begin shortly.
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