62 HARRISONS’ NURSERIES 

Spruces grown this far apart in the nursery have thick foliage from 
tip to base 
Spruce 
For ornamental plantings and windbreaks, the green spruces are 
almost indispensable. They are not surpassed by any evergreen in 
the winter landscape, and in summer make a most charming foil for 
Koster’s blue and Colorado blue. In fact all of the varieties harmonize 
with the deep coloring of the pines and hemlocks. The spruces are 
upright growing trees, tapering to a pointed top. 
(Picea pungens Kosterii). With- 
oster’ S ue our question the handsomest of 
he blue-foliaged lawn trees. The 
foliage, borne very densely on ine branches, is an intense silver- 
blue. The tree is a slow grower and has regular, slim branches. 
All of our trees are grafted from fine-colored specimens and of 
the rich blue shade that makes the Koster spruce so handsome. 
Scions are cut from the bluest and most handsome specimens that 
can be found and are grafted on sturdy seedling roots; this method 
insures every specimen to be of the true blue color. Seedling 
blue trees often revert to the green type, but the grafted trees 

do not disappoint: Each 10 
2 to 3 feet SAS, Bee iE aise TOE OY BEA" O00" $30) 100 
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OXto) 7 feet itis ce fee el Rae TS Sy See Nee Ee OOMTOORUG 
7 to 8feet . “fates Ae Dna cs. ee reat naire trike alps ony Mec COCO) 
Colorado Blue (P. pungens glauca). This variety is hardy 
and slow-growing, taking a shape that is 
symmetrical, narrow-pointed, and gracefully tapering toward the 
top. The foliage is blue and sage-green, and the trees seem at 
their best when planted in front of dark-colored evergreens. 
Each 10 
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COLORADO GREEN (P. pungens). The original form of the 
Colorado blue spruce, but the foliage of the parent is only occa- 
sionally blue; the usual type is a light green. The tree makes a 
specimen of great beauty and is a strong, hardy grower. 
Each Io 
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