Successful growth of micropropagated ornamental tree forms in northern Finland

Micropropagated trees, Alnus incana f. laciniata, Betula pendula f. crispa, Betula pubescens f. rubra, Populus tremula ‘Erecta’ and Prunus maackii, were studied in a selection experiment at four different study sites in northern Finland. The aim of the field experiment was to identify hardy and valuable special tree forms for northern landscaping based on tree phenology and success. All the trees studied revealed some good characteristics and have potential in northern horticulture. B. pubescens f. rubra (red-leaved downy birch) is especially noted for its excellent winter hardiness and showy appearance at every study site. It is a valuable addition to the tree selection for use in northern landscaping.