The inflorescence type for black-eyed Susan (Rudbeckia hirta) plants is the head or the capitulum. The center of the flower is distinct black, surrounded by yellow colored, petal-like florets. It is best grown in USDA zones 3 - 9 and prefers well-drained soil. The bloom period is for 3 months and you can extend it by deadheading faded blooms. The plant is also called golden Jerusalem, Poor land daisy, and yellow daisy.
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| Black-eyed Susan |
Read more at Buzzle: http://www.buzzle.com/articles/perennial-flowers-that-bloom-all-summer.html
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