After pruning I give them a generous layer of manure : about two large French breakfast cups of manure per rose and try to mix it with the existing soil. Then they are sprayed with Bouillie Bordelaise, which I repeat when the new young leaves appear on the branches.
I’m always looking out for bargains where manure and fertilizer are concerned. Today I found horse manure at the Intermarché in Barjols very reasonably priced, just 4.90€ for 20 kilo. One bag was sufficient for 10 roses and 4 fruit trees.
The photo shows the yellow Rosa banksia, Dutch irises (Iris x hollandica) and white flowering ground cover roses.