Homeopathy for the roses

I love using homeopathic remedies in the garden.  Three weeks ago my roses were looking a little sad after the first flush of flowers and a lot of them had black spot on the leaves.  So out with a remedy and the result is great.  In the photos below you an see three distinctive layers of growth, the fresh new leaves and the slightly older new leaves, both of which have no sign of black spot and the older leaves covered in spots below.  And not an aphid in sight after a remedy applied for those little devils as well.