Seed source lifting windows for Douglas-fir in the Humboldt Nursery


Field survivals of seedlings grown in California's Humboldt Nursery continue to range from excellent to disastrous. Since most complaints about Humboldt seedlings originate from interior regions east and southeast of the nursery's north-coastal site, survival would seem to depend largely on the seed source and the planting location. For selected sources, we determined the relation of first-year survival in the area of seed origin to the time that seedlings were lifted in the nursery. The findings are a skeletal guide to the proper times to lift planting stock for each region served by Humboldt Nursery.
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Publication Forest Nursery Proceedings
Event Eureka, CA - 1978
Author James L. Jenkinson, James A. Nelson
Published 1978/10/01
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