Food and water
Roses have to be given nutrients in the form of manure or NPK fertilizer. When roses fail to thrive, it is often because they are undernourished.
Spread manure out in a layer between the roses in the autumn or early spring. Scatter NPK fertilizer in April, using approx. 1 kg per 10 m . Apply 1/2 kg of nitrogen fertilizer per m2, e.g. calcium nitrate or sulphate of ammonia, in June.
Watering may be necessary in dry periods. Always water thoroughly, i.e. at least 20 litres per square metre of rose bed.
