If you want to have healthy roses, the first thing to do is to create the ideal conditions for them. The suitable soil is loamy - well loosened - has no stagnant moisture - has humus components in the upper area; a balanced supply of nutrients should be provided and a PH value of 6 to 6.5 should be achieved; at least about 4 hours of sunshine on a daily average is good, if possible no slipstream.
The above mentioned conditions are actually feasible in almost every garden and reduce the infestation pressure, especially by fungi, considerably.
Care should be taken when using highly corrosive and burning substances such as horse manure and bark mulch. These things should only be applied after a good, longer period of storage and in moderation.
In spite of all these measures, your roses will unfortunately be repeatedly afflicted by fungi and animal pests.
It makes sense to take preventive measures - as always, prevention is the better and cheaper solution. We recommend a spraying rhythm of 2 weeks for normally sensitive varieties - for collector's roses a weekly rhythm.
When spraying, make sure that you spray either early in the morning or in the evening, always spraying the underside of the leaves first (the upper side is automatically moistened as well).
One should start spraying preventively after the leaves have developed and/or the first slight infestation appears in March/April/May, depending on the weather.
Strong temperature fluctuations and damp leaves always increase the infestation pressure. It is also important to change the agents more often to avoid the development of resistance.
