P&PDL Picture of the Week for
May 19, 2008

Arborvitae Shoot Tips Turning Brown

B. Rosie Lerner, Extension Consumer Horticulture Specialist, Department of Horticulture and Landscape Architecture

The brown tips one these Arborvitae branches are actually normal production of flowers. Arborvitae has separate male and female flowering structures called cones. The male cones shed large quantities of fine, yellow, dust-like, pollen, usually in April, then those flowers fall off. The female flowers become the seed-bearing structures, as they mature into small, wooden cones.

Figure 1-3 courtesy of Jim Peter, Dubois County

Figure 4 courtesy of Gail Ruhl, PPDL

Click image to enlarge

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Figure 4

Purdue Plant & Pest Diagnostic Lab Purdue Cooperative Extension Service