Size Potential
In its familiar setting, a Douglas Fir-tree can span heights of 300 feet or expanded. Many specimens are between 100 and 200 feet high. The Kingdom of Washington Branch of Essential Means famous that living trees obtain been documented at approximately 16 feet in calibre and at heights of approximately 326 feet.Douglas Fir-tree trees (Pseudotsuga menziesii) are the largest member of the pine family. Harvested for lumber, these trees are very the favourite for cause as Christmas trees in the USA. The counted on area of the Douglas Fir-tree is from southern Mexico to central British Columbia and from Colorado to the west Seaside. As an ornamental, Douglas pines are grown primarily in the northern half of the USA.
As a outlook tree in backyards and residential areas, a Douglas Fir-tree typically achieves 40 to 60 feet in heighth with a spread of between 12 and 20 feet.
Tree Longevity
It is not rare for a Douglas Fir-tree to breathing for 600 to 800 dotage. Some trees are documented at over 1000 caducity of age, with some of those living between 1300 and 1400 years. Tree height and dimensions, however, are not good indicators of age. Some young trees grow tall in just 20 years or so, while old trees may live for centuries but not attain more than 100 feet in height.
Fire and Decay Resistance
One reason for the longevity of a Douglas fir is its thick bark, which helps protect the tree from fire extremely as from attack by insects and fungus that may cause the tree to rot. Douglas fir bark grows on the outside of the cambium layer, pushing older bark out. The tree keeps growing bark for years, much longer than other trees, and ends up with a thick layer. Douglas fir bark can be as thick as 14 inches. Charcoal stains on the outside of many Douglas firs indicate brushes with fire.
Soil Conditions
Douglas firs tolerate a wide variety of soil conditions as long as they do not harbor standing water. Trees can grow in clay soils, sandy loams, silt, acidic conditions and loam. These trees root well in moist conditions too as in well-drained soils.
