I have a couple of hellebores which are just beginning to flower. The
leaves on both plants, despite spraying with fungicide, have Black Spot
fungus disease, and I have read somewhere recently (I think in the Garden
News) that you should cut off the diseased leaves and remove the top bit of
soil to remove the fungus spores.

But all the leaves are diseased, so that means I would have to cut off ALL
the leaves. Wouldn't doing that kill the plant (no leaves no food
production)?

Thanks