The Significance of Rootstock for Rose Cultivation: Symbiosis as the Foundation for Success In modern rose cultivation, grafting a variety rose (scion) onto a specially selected rootstock is not just a technical method, but a strategic element determining the plant's viability, productivity, and longevity. The rootstock is the foundation, from whose properties over 50% of the final characteristics of the rose depend. Its influence is of a comprehensive agrophysiological and biochemical nature. 1. Functions of the Rootstock: More Than Just a Root The rootstock performs a series of critically important functions that go far beyond mechanical support and water-mineral nutrition. Adaptation to soil conditions: The main task is to ensure the viability of the rose in specific, often not ideal, conditions. For example: Rosa canina (dog rose): Widely used in Europe due to high winter hardiness and the ability to grow on heavy, wet clay soils. However, it is sensitive to drought and alkaline soils. Rosa multiflora (multiflora rose): Possesses a powerful, fibrous root system, prefers light, slightly acidic soils. Ensures abundant flowering, but less winter hardy. Rosa laxa (loose rose): Especially valued for regions with severe winters and alkaline soils (Siberia, Canada), as it has exceptional frost resistance and tolerance to high pH. Management of growth force and habit: The rootstock acts as a natural regulator. Strong-growing rootstocks (such as some clones of R. canina) are suitable for park and climbing roses. Weak-growing ones (e.g., "Indian Rose" rootstock based on R. indica) are used for miniature and container roses, forming compact plants. Resistance to diseases and pests: The rootstock serves as a buffer against soil pathogens. The clonal rootstock "Dr. Huey" in the USA is partially resistant to nematodes. Some modern rootstocks selected by breeder V. N. Bylov have increased resistance to root rots. Influence on longevity and productivity: A properly selected roo ... Read more