Ministry of Forests

Cariboo Region Research Section

Identification and Management of Summer Frost-prone Sites in the Cariboo Forest Region


In recent years, foresters in the Interior of British Columbia have become increasingly aware that summer frosts can significantly affect the survival and growth of young forest plantations. As a result, they have requested guidelines for identifying frost-prone sites and for developing management practices to minimize the impacts of summer frosts. FRDA project 3.65 was initiated to meet these requests.

This is the second report prepared under FRDA project 3.65. The first report, prepared by R.J. Stathers and released in 1989 (Summer Frost in Young Forest Plantations, FRDA Report 073), summarizes the causes of summer frost and its impacts on young tree seedlings. The second report, presented here, is based on the principles outlined in the first report. It provides a means for assessing site-specific frost hazards in the Cariboo Forest Region and summarizes some management options for reducing the impacts of summer frost.

This report includes both a main text and a field guide. The field guide is contained in the back pocket and includes reference tables which can be inserted into a standard field notebook. The field guide is designed only as a field reference and should not be used without familiarity with the contents of the main report.

This report is a first approximation and will probably be updated as additional information on the occurrence of summer frost and its impacts on tree seedlings becomes available. The authors would greatly appreciate receiving any comments or suggestions for improvements to this guide.

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