Since the turn of the 20th century reforestation efforts have been made, and forests now cover about 2% of the country, of which two thirds are birch. Coniferous trees have also been planted on a large scale, mainly the sitka spruce (Picea sitchensis), lodgepole pine (Pinus contorta) and the European larch (Larix decidua). This has been mostly done in lowland areas below 450 metres, where the climate is warm enough for these species to grow. As of 2016, conifers cover more of Iceland than birch, 39.5% compared to 29.5%.
While trees of almost every species can grow in some parts of Iceland, none are commercially viable because of the small size and poor quality of the resultant timber, coupled with the high cost of transporting usable wood to market.