Show spruce and fir among best windbreak trees norway spruce and douglas fir are the most satisfactory trees to use as windbreak plantings according to J E davis extension forester college of agriculture university of illinois A good windbreak is easy to have its success depending upon location soil preparation choice of trees spacing protection and care A windbreak will be effective eff en etive on the leeward for a distance eight times its height since the trees average 43 feet in height it is best not to have the buildings nearer than 50 feet nor farther than feet from the trees if closer than 50 feet snow drifts may form on buildings and dead air pockets may cause excessive heat in summer the windbreak affords best protection if built in the form of an inverted L on the west and north of the farmstead plowed preferably in the tall fall the land may be be fitted in the spring at least 4 year old transplanted trees are recommended and even larger trees will assure more success |