120 SILVICULTURE METHODS OF ARTIFICIAL REPRODUCTION 



1-0 One year in seed bed only. 



2-1 Two years in seed beds and one year in transplant rows. 

 2-2 Two years in seed beds and two years in transplant rows. 

 Larger plants than four years of age are generally considered too 

 expensive for use in forest planting. 



FIG. 61. 2-year old seedlings of Norway spruce in seedbeds at the Saratoga 



nursery, New York. 



6. WHEN TO PLANT 



Planting is generally done when trees are from one to four years 

 old. At that time they are easy to transplant, easy to lift from the 

 soil, and relatively easy and cheap to plant; the likelihood of survival 

 is high, and the trees are of sufficient size to compete with the grasses 

 and weeds which are usually found on planting sites. 



It is of importance to use larger and more resistant planting stock 

 wherever the difficulties, such as competition, are severe. 



Planting is usually done during the spring in the North and North- 

 east and Northwest as soon as the frost leaves the ground. In the 

 South, planting may be done any time throughout the dormant season, 

 that is, during the winter. Autumn planting is sometimes practiced 

 in the Lake States and Northeast but is not generally recommended 

 in regions and on sites where frost heaving may be severe. 



