Tree planting on Oregon’s east side is primarily done after wildfire if most of the trees in an area are killed. In fact, many of these forests have too many trees. These forests are often selectively logged, and no tree planting is usually required. In recent years, drought has led to poor survival of some species, and ponderosa pine and incense cedar have been favored over Douglas-fir and white fir.Įast of the Cascades, many of the forests are primarily ponderosa pine, lodgepole pine or a mix of conifers. These forests are generally planted with a mix of species after logging. The forests in southwestern Oregon are fairly complex and often have a mix of four or five species of conifer, including ponderosa pine, Douglas-fir, incense cedar, western white pine, Jeffrey pine and white fir. In addition to the sites in western Oregon where Douglas-fir is the predominant species, there’s also some timber harvest – and thus, tree planting – in southwestern Oregon. That’s because Doug-fir is not shade-tolerant and doesn’t do well as an understory tree. Folks who are trying to develop multi-story stands usually plant shade-tolerant conifers such as western hemlock, grand fir and western redcedar beneath an overstory of Douglas-fir. Western redcedar is commonly planted along streams and even in the understory of thinned Douglas-fir stands.
Forests with a mix of tree species may also attract a larger variety of wildlife. A mixed-species stand of trees may be more resistant to diseases and insects, which usually favor one species over another. Reforestation of laminated root rot pockets generally involves planting western redcedar, which is resistant to the disease, or red alder, which is immune.Įven where Douglas-fir is the preferred species to plant, many forest landowners enjoy having a mix of species in their forests and often mix in other conifers. This disease kills all the Douglas-fir trees in pockets that are a quarter-acre or larger. In the Coast Range and the Cascades, the most common root disease is laminated root rot.
On the north Oregon coast, where Swiss needle cast is most common and can severely limit Douglas-fir growth, reforestation typically involves planting western hemlock, Sitka spruce and western redcedar. Both these diseases are common in western Oregon, and both either primarily or exclusively attack Douglas-fir. Some situations where Douglas-fir is not the best species to plant are in areas that have diseases such as laminated root rot or Swiss needle cast. A primary tenet of Oregon’s law requiring reforestation is to replant the same species that were removed in most cases, unless there’s a good reason not to. Most timber harvest involves logging Douglas-fir trees, which often end up at mills that use them to make lumber or plywood. Oregon’s forest protection laws require private landowners to replant trees after harvesting timber. Another reason is that most planting is done after logging on private lands. That’s because as a native tree species it is well adapted to most of the sites where planting is done. Doug-fir is the most common tree planted in Oregon, however. To answer the second question, not all of the 40 million trees planted in Oregon’s forests each year are Douglas-fir. My hat goes off to the tree planters who put each seedling in the ground by hand. Most of the work of tree planting takes place in cold and rainy weather, on steep and rugged terrain. That seems pretty doable – but it isn’t easy work. It would thus take 455 tree planters about 88 days to plant 40 million trees. If each tree planter plants 1,000 trees per day for 88 days, that’s 88,000 trees per tree planter per year. 1 to March 31, which is about 88 work days. To answer the first question, 40 million seedlings may seem like a lot, but a good tree planter plants 1,000 to 1,200 seedlings per day.
Many people believe this fact at face value, but some have questions. We’ve been focusing on reforestation after timber harvest, and frequently tout the fact that every year Oregon forest landowners plant 40 million seedlings.
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