If the stems rot, the leaves and flowers no longer stand a chance. Because they neither find support nor are they fed. Stem root rot is a serious plant disease. The Christmas rose must be protected from her for around 30 years of life. But how?
My Christmas rose has stem rot, what do I do?
Stem root rot can be caused by various fungi that cannot be distinguished based on the damage pattern. Fighting it in the home garden is not worth it and is hardly possible anyway. Dispose of your Christmas rose When planting new ones, you should avoid heavy and wet soil.
How does stem rot appear on the Christmas rose?
Stem rot of the Christmas rose (Helleborus niger) usually occurs inspringafter the new growth has developed. It is more dangerous for the perennial than the common black spot disease. Although the leaf stems and foliage apparently look he althy,the shoots simply bend over without any mechanical influence on them from the outside. A closer look reveals small brown or black spots at the base that are obviously rotting.
Which fungal pathogens are suspected to be behind the disease?
Stem root rot and rhizome root rot are caused by so-calledsoil-borne fungi, of whichvarious species are known. For example Pythium, Phytophthora and Rhizoctonia. The symptoms of the Christmas rose, also known as the snow rose and black hellebore, do not differ. The exact pathogen can only be determined by examining a sample in the laboratory. However, this costs money, takes time and doesn't really help with the fight.
How can I prevent stem rot on Christmas roses?
These fungal pathogens are known to like moisture. That is why the location of the Christmas rose is of crucial importance. Care, especially watering, must also be carried out as needed so thatno waterlogging can occur. Specifically this means:
- do not plant in loamy soil
- Set up drainage layer
- water only on hot days
- water only a little in winter on frost-free days
- always let the top layer of soil dry first
- pour away excess water from potted plants
Tip
Dispose of the affected plant completely
The fungal pathogens can survive in the soil and even overwinter. Therefore, completely remove Christmas roses affected by stem rot from the bed. You should also generously replace the surrounding soil. Neither belongs in the compost, but in the residual waste bin.
