Douglas-Fir Seedling Grows 8 Feet Tall in Two Seasons
A 96-inch-tall coastal Douglas-fir (Pseudotsuga menziesii [Mirb.]Franco) seedling was grown from seed in two years. Greenhouse temperatures of 60° to 70° F, a six-month growing season, long day, adequate winter chilling, large pots, periodic fertilization, and frequent watering are thought to be contributors to the rapid growth.
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Document Type: Journal Article
Affiliations: Project Leader, Forestry Sciences Laboratory, Pacific Northwest Forest & Range Expt. Sta., Forest Service, U. S. Dept. Agric., Corvallis, Ore.
Publication date: 01 March 1969