Ornamental Plants
Annual Reports and Research Reviews
2001

Special Circular 186-02

Biological Clocks: A Five-Year Calendar of Plant and Insect Phenology in Secrest Arboretum

Literature Cited

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Herms, D. A. 1999. Understanding and using degree-days. In: M. A. Rose and J. A. Chatfield, Eds. Ornamental Plants: Annual Reports and Research Reviews, 1998. pp. 70-76. The Ohio State University. Ohio Agricultural Research and Development Center. Special Circular 165, 136 pp.

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Table 1. A Phenological Sequence for Wooster, Ohio, from 1997-2001.