Plot 1 – Brechfa Forest Garden.
Botanical name Pseudotsuga menziesii
Common Name Douglas Fir
The Douglas fir (Pseudotsuga menziesii) is an evergreen conifer species in the pine family, It is native to western North America and is also known as Douglas-fir,Douglas spruce, Oregon pine, and Columbian pine.
There are three varieties: Coast Douglas-fir (P. menziesii var. menziesii), Rocky Mountain Douglas-fir (P. menziesii var. glauca) and n Douglas fir (P. menziesii var. lindleyana).
Despite its common names, it is not a true fir (usgen Abies), spruce (genus Picea), or pine (genus Pinus). It is also not a hemlock; the genus name Pseudotsuga means “false hemlock”.
Summary of trial plot 39 years after planting.
provenance stocking health at 40 years comments
Washington average good tall but not best origin.
cumulative basal top height, general yield class
-area production,
sqm/ha
63.4 32.3 26
Note that, in these plots, top heights were assessed after one growing season more than the basal areas.
Comparison of General Yield Class in species plots at Brechfa with other published Welsh or British data.
Brechfa Other
26 18:12-22 Source Aldhous and Low, 1974;
Notes of 4/11/2009
OK
Notes of 22/08/2018
Trees fairly tall and thin with sparse foliage higher up. Otherwise ok
Useful links
Wikipedia
Woodland Trust
Conifer Database
RHS Gardening
