Non-Flowering Rudbeckia - Knowledgebase Question

Clifton Park, NY
Question by searcherone
August 3, 1999
I planted a number of rudebeckia plants last summer. All have come back very strong but only a few have flowered. They are all in the same garden, same light, same water. I have fertilized every 2 weeks but cannot get them to flower. The plants are very large and healthy looking. Any idea of what the problem could be???

Answer from NGA
August 3, 1999


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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