Website/Catalog  (1971)  Page(s) 11.  
 
'Blue Boy'. Shrub (1958). 3 1/2 - 4 1/2 feet. One annual flowering. Large flowers of Hybrid Tea form, usually in clusters of three, open a deep, plum purple gradually turning to blue violet and slate blue tones. A plant covered with flowers in various stages of opening and changing color is exciting, fragrant and beautiful! One of Wilhelm Kordes's creations, with a Floribunda and a Moss as parents... and very hardy.

Book  (1971)  Page(s) 106.  
 
'Blue Boy'. Modern shrub. Lilac-pink, early summer, 4 1/2 ft (1.4m) 1958. Raised by W. Kordes, Germany. Parentage: 'Louis Gimard' x 'Independence'. Modern shrub rose up to 4 1/2 ft (1.4m) but not very vigorous and misnamed for colour. Flowers double, large, of hybrid tea form, lilac-pink flushed deep purplish-maroon with some violet tones, variable in colour as it matures and fades, fragrant. Not recurrent. Raised from an old Moss rose and a Floribunda.

Website/Catalog  (1970)  Page(s) 18.  
 
1969-1970 catalogue.
Hybrid Perpetual Roses. 'Blue Boy', 1958. A lovely modern H.P. rose, deeper in colour than 'Reine des Violettes'; - a wonderful reddish-violet shade - and very richly scented.

Book  (1969)  
 
p46. Roses for hedge-making. 'Blue Boy'. Height 5-7 feet.

p50 .....a few new cultivars of some groups, including the Moss Roses are being bred.
'Blue Boy'. Introduced by Kordes in 1958 and bred from 'Kordes Sondermeldung' and an almost unknown Moss Rose 'Louis Gimard'

p57 Mauve and Lilac: 'Blue Boy' (Moss Rose).

Website/Catalog  (1963)  Page(s) 17.  
 
Pillar and Shrub Roses.  Blue Boy Tall bushy, almost climbing growth producing medium sized bluish red blooms in spring. Semi-double.  Fragrant. 

Website/Catalog  (1961)  Page(s) 13.  
 
Pillar and Shrub Roses. Blue boy Bluish red. Semi-double. Fragrant. 

(1961)  Page(s) 14.  
 
Pillar and shrub Roses. 'Blue Boy'. Large double bloom of a reddish violet hue, very fragrant, and having light green foliage. Spring flowering only.

Book  (1959)  Page(s) 17.  
 
Harry H. Hazlewood.  Some New Roses for 1959.  
Two unusual novelties are 'Black Boy' and Blue Boy from Wm. Kordes. 'Blue Boy' is listed as a Park rose, but has all the appearance of a climber, with bluish red medium-sized blooms. Its performance will be watched with interest as the production of a really blue rose seems to be a popular desire.