Website/Catalog  (1928)  Page(s) 3.  
 
Rugosas and their hybrids.
F. J. Grootendorst. Hybrid Polyantha-Rugosa. (De Goey, 1918.) This is a new type which might be called a Rugosa Baby Rambler, being a cross between Rugosa and the Crimson Baby Rambler. Imagine a shrub-like Rugosa covered with trusses of Crimson Baby Rambler Roses. It is absolutely hardy and continues in bloom until late in the fall.

Book  (1927)  Page(s) [2].  Includes photo(s).
 
Grootendorst  Bright orange red, flowers in clusters.  This rose has become a most popular novelty.  It combines in a unique way the valuable characteristics of its two parents, the Baby Rambler and the red Hybrid Rugosa.  It produces a wealth of small flowers similar to the Baby Rambler but in true Rugosa style bears them in clusters.  This rose has the green leathery foliage of the Rugosa roses.  Having inherited a continuous blooming habit from both parents, it is one of the most prolific and continues to bloom from June until frost.  The foliage is very attractive, stems growing to an even height averaging from three to four feet having a semi-dwarfish habit.  Few roses are so well adapted to landscape wrork in low mass planting.  The Grootendorst rose is sure to continue in popular favor.  It can be depended upon in all locations to be a healthy, vigorous and an attractive rose-shrub.

Website/Catalog  (1927)  Page(s) 50.  Includes photo(s).
 
Ironclad Rugosa Roses
F. J. Grootendorst (Illustrated on opposite page.) A new combination of the Baby Ramblers with the Rugosa. Bright red flowers of small size, fringed and double, produced freely and continuously in large bunches, through spring, summer, and fall. An ideal hedge plant that will reach 5 feet or more but it will retain its qualities better if pruned each year, leaving only the wood formed the previous season. $1 each.

Booklet  (1926)  Page(s) 52.  
 
Rugosa Hybrids
Since the rugosa rose from Kamchatka and Northern Japan is the only absulutely hardy, ever-blooming rose that we have, it has been used considerably in recent years as a parent in the breeding of many new hybrids. These rugosa hybrids usually possess the foliage character of rugosa and partake of their hardiness, healthiness and general thriftiness of this parent but are not always so continuous in their blooming habit. Though these hybrids do not compare as cut flowers with the hybrid teas, they are far superior for general landscape planting about the home grounds. In Michigan, they are of special value by reason of their hardiness...
F. J. Grootendorst, Very Hardy
This is the first of a race of rugosa roses hybridized with polyanthas, or baby ramblers, combining the characters of the flowers and ever-blooming habit of the polyanthas with the heavy, wrinkled foliage, hardiness and vigor of the rugosa. The bright red double flowers are freely and continuously produced in large clusters from early June until late fall. It is one of the most suitable plants for ever-blooming hedges and also desirable for shrubbery and specimen plantings.

Book  (1926)  Page(s) 71.  
 
F. J. Grootendorst (DeGoey, 1918) is unique, with the strong, coarse foliage of Rugosa and the cluster-blooming habit of the Polyanthas.  Its flowers are steadily produced through the season and resemble clusters of small red carnations.  It can be kept about four feet high.

Book  (1925)  Page(s) 206.  
 
Otto Greef, Pittsburg, Kans.  F. J. Grootendorst, half Polyantha, half Rugosa, leads naturally to a consideration of the latter class.  For itself, its fine habit and good foliage, afford a handsome background for its perpetual unfading red blossoms.  It, and its pink sport already reported, reveal new possibilities for good hedge roses that may be evolved from the many colored ramblers and Polyanthas.
 

Website/Catalog  (1925)  
 
F. J. Grootendorst Bright red flowers of small size, fringed and double, produced freely and continuously in large bunches, through spring, summer, and fall. It will, if allowed, in three years, reach a height of 5 feet or more [ca. 1.6 m +], with foliage almost equal to the original Rugosa. Though it can easily be kept lower, it makes a splendid shrub or specimen bush, or the finest type of everblooming hedge." 

[Courtesy Brent C. Dickerson, The Old Rose Adventurer, page 231]

Book  (1924)  Page(s) 186.  
 
The Origin of the rugosa Hybrid, F. J. Grootendorst.  A letter in May, 1923, from a Holland nurseryman who has given the most careful and useful attention to compiling an accurate list of rose varieties, mentions the origin of this excellent and unusual Polyantha hybrid in the following words: 
"I was among the jury that gave the first award to this rose.  It was in the nursery of a very small fellow, and I remember that we gave it the highest award because we thought of the great possibilities of this rose in a rough climate.  Some people have blamed us for it, but I am still proud of my share in it.  You will find the name of the raiser (De Goey) in our coming list (Grootendorst is the introducer only), which list is now ready for the press.

Website/Catalog  (1924)  Page(s) 24.  
 
The following sorts contain a few of medium quality and many quite unsuitable. They are therefore "discarded." F. J. Grootendorst

Book  (1923)  Page(s) 24.  
 
One recent Hybrid Rugosa, a cross of the species with a Polyantha rose, is always in bloom, and is rather well described as  "a Rugosa rose with the flowers of a red carnation". It is known as F. J. Grootendorst.