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'Karl Foerster' rose References
Book  (1976)  Page(s) 73.  
 
'Karl Foerster' (W. Kordes, 1931) = R. spinosissima var. altaica X 'Frau Karl Druschki' (Hybrid Perpetual); bushes up to 2 m tall, semi-double, large, pure white, floriferous.
Book  (1964)  Page(s) 95.  
 
'Karl Foerster' (W. Kordes 1931). (= R. pimp. var. altaica X Frau Karl Druschki). Shrub ca. 2 m tall, bushy, vigorous canes...
Book  (1960)  Page(s) 80.  
 
Nancy Steen. Roses in a White Garden.
Karl Forster promises to be a real gem. It inherits from one parent, 'Frau karl Druschki', its perpetual blooming habit; but also, unfortunately, its lack of scent. The semi-double, medium sized, chalk-white blooms open rather flat, and clothe the whole length of the prickly arching stems. The other parent, the Siberian R. spinosissima altaica, considered to be the finest and largest flowered white rose of that species, gave 'Karl Forster' its thorny dark brown stems and the seven small leaflets.
Website/Catalog  (Nov 1959)  Page(s) 60.  
 
(Spinosissima Hybrid) 1931 ('Frau K. Druschki' x R. spinosissima altaica) Useful, bushy, well-filled shrub with light green ample foliage. Perpetual flowering, shapely buds opening to large snow-white double blooms. Its lack of scent is its only fault. 5' x 4'.
Book  (1959)  Page(s) 146.  
 
Karl Forster. Crossed with 'Frau Karl Druschki', R. spinossima altaica has produced this fine hedging plant. It makes a dense bushy growth and bears large double white flowers.
Book  (1954)  Page(s) 185.  
 
Karl Förster. 1931). To date, this is probably the best of the Kordes roses that have been derived from the R. spinosissima group, and is a hybrid of variety altaica and 'Frau Karl Druschki'. The very large, semidouble to double, high centered, snow-white blossoms are borne intermittently throughout the summer, on a 7-foot plant. It is one of those rare hybrids in which the best qualities of both parents have been combined. Were it not for the fact that it is exceptionally difficult to propagate, it would probably be one of our most popular shrub roses.
Magazine  (Aug 1953)  Page(s) 19.  
 
Chester D. Wedrick, Simcoe, Ontario. Roses Immune, or Nearly So to Blackspot.
...One rose that should not be overlooked is Karl Forster, the result of a cross of Frau Karl Druschki and R. spinossisima altica simplex. It is a fair sized shrub bearing large, snow-white, camellia-like blooms throughout the whole season and seems free of all disease. Last but not least, it can withstand a temperature as low as 25 below zero successfully, without protection.

[note - 25 degrees F.]
Magazine  (1948)  Page(s) 179-180 vol 52.  
 
Perch H. Wright
For some years I considered that spinosissima altaica was the most promising of the superhardy species for our purposes, for the variety Karl Foerster (also by chance a German origination, produced by Wm. Kordes by pollinating Frau Karl Druschki with altaica pollen) produces a flower with remarkable good textured petals and a strong, if short flower stem, and, most important of all, does not lose the everblooming habit inherited from its Hybrid Perpetual ancestry. However, it turns out that Karl Foerster is difficult to bud, and nurserymen are loathe to undertake its propagation on account of the low percentage of catch, and furthermore, this difficult budding seems to be a characteristic of all altaica seedlings. Of course, there is presumably nothing to prevent the linkage of the other and desirable altaica features with this difficult propagation being broken eventually. However, the failure to break a similar linkage of undesirable characteristics in the case of rugosa is not encouraging.
Magazine  (1939)  Page(s) 60.  
 
Karl Förster...(W. Kordes Sons...
Book  (Jul 1938)  Page(s) 90.  
 
R. spinosissima altaica x Karl Frau Druschki, Karl Foerster Rose. - Said to be very hardy and dependable.
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