Multiflower rose - Rosa multiflora Thunb. Recently, it has gained great popularity and has found wide application. Like the wild rose - it comes in many different types, often varying in strength of growth, resistance to frost and longevity. It is this abundance of forms that has caused, that the multi-flower rose was underestimated for a long time; often found types of little value (maybe even the seedlings of climbing roses) and was quickly forgotten. The beginnings of her career as a rootstock date back to the seventies of the last century; it was already used in some German nurseries at that time, but probably in not very valuable types, since opinions about her from that period are very restrained. Soon, however, valuable forms of the multi-flower rose had to be found, because even before the First World War, there was a lot of interest in it in Central Europe. In the 1920s, there was already R.. multiflora successfully used in a wide range in many German and Luxembourg nurseries and considered an excellent rootstock for bouquet and climbing roses, with which she is closely related. The roses of these breeds grow stronger on it than on the wild rose, have a profuse and shallow root system, bloom no worse than on R.. canina and are satisfied with more modest soil conditions; on the other hand, they have higher demands on humidity.
Many outstanding professionals (Tantau, Kordes, Rathlef, Kache, Kriissmann) clearly indicates, that R.. multiflora should only be used for related roses, so bouquet and climbing, for which it is a better rootstock than wild rose. However, they warn against using it under large-flowered roses, for which it is not a full-fledged washer, because the bushes grafted on it have a short life and produce less colored flowers, especially in times of drought. This objection was reflected in the official recommendation of the West German Nurseries Association (Association of German Tree Nurseries), which he commands, that large-flowered roses budding on R.. multiflora were clearly marked as to the rootstock, because they are of limited value.
Greater growth force than wild rose, much higher yield in cut flower cultivation as well as shallow and abundant root system - and therefore extremely valuable qualities - make some of our producers try to use it for varieties of tea hybrids in greenhouse cultivation. The limited lifespan is not such a big disadvantage in this cultivation as in field cultivation, because for economic reasons, production under glass must be strong and fast (about 5 years) exploitation of shrubs. Also, the weaker color does not play a major role here. Therefore, searching for the types of multiflorous and lush rose, healthy growth, living well with tea hybrids for at least a period 5 years, may be of major importance for the intensification of greenhouse cultivation.
However, the value of R is not questioned. multiflora as rootstocks for bouquet roses grown under glass. This is especially true for pot cultivation, where the use of this pad enables, if necessary, a very significant reduction of the period of preparation of the bushes for forcing. Suitability for potting is also associated with abundance, but the shallow root system of this rose.