Hardwood planting is gaining more acceptance in British Columbia as markets expand for the common species. Investigation into mixed planting has indicated that, in certain situations, these techniques may confer some growth and performance advantages to the conifer component of a mixed planting. Advantages of planting hardwood trees for rehabilitation Hardwood species are often natural pioneers of disturbed sites. They can establish easily, produce large quantities of leaf litter which helps rebuild the forest floor, stimulate plant and microbial activity and re-establish soil ecosystem functions. Their roots help improve soil physical and chemical properties.
Red alder has the additional benefit of being able to fix nitrogen.
A hardwood cover on rehabilitated areas within a cutblock may contribute to the achievement of biodiversity and wildlife habitat objectives. Depending on the stocking levels, hardwoods may act as a nurse crop and improve conifer growth by moderating temperatures and protecting softwood regeneration from browsing and windthrow. Shorter rotations for most hardwood species allow more flexibility in the timing of rehabilitation. For example, on blocks requiring access for some time after planting, rehabilitation of roads and trails could be delayed without losing the opportunity to produce a merchantable hardwood crop. Disadvantages of planting hardwood trees for rehabilitation Returns on planting cost investment may be lower than for other species, though that may change.