34 College of Forestry. 



soil, a growth of five years will cause the trees to spread over 

 considerable space and with a few years of additional growth, 

 they will not appear too far apart. Many planters have 

 located trees with a spacing of from 10 to 25 feet expecting 

 to remove every second tree after the growth had produced a 

 fairly large crown. Invariably the good intentions of the 

 planter have never been carried out and the trees and the 

 street have suffered in consequence of the mistake in spacing 

 at the beginning or from the neglect in removing one-half of 

 the trees after a fair amount of growth has been made. 



Quick Growing Trees May be Planted with Species for 

 Permanent Use. 



A combination of quick growing trees with those to form 

 the permanent planting may be used, although this method 

 is not to be recommended. By planting along the walk a 

 quick-growing variety on the side toward the houses and 

 alternating these with a permanent variety planted between 

 the sidewalk and edge of the roadway, a fair amount of shade 

 may be secured early from the quick-growing trees. After 

 the permanent trees have grown large enough to furnish 

 shade, the temporary trees may be removed. The trees used 

 for immediate results should never be retained more than 

 seven or eight years. 



Trees for permanent planting should be placed not less 

 than thirty feet apart and some varieties require sixty feet 

 for normal expansion. The following table may serve as a 

 guide for the proper distance to space street trees. 



Table Showing the Distance for Spacing Street Trees. 



SO-S5 feet apart. S5-40 feet apart. 45-60 feet apart. 



Norway Maple Pin Oak Oriental Sycamore 



European Linden American White Ash American Elm 



European Silver Linden Thornless Honey Locust Red Oak 



Crimean Linden Sugar Maple Scarlet Oak 



Schwedler's Maple ' White Oak 



Red Maple Tulip Tree 



Maiden Hair Tree 

 Hackberry 

 Sweet Gum 

 Ailanthus 



