Rose black spot/rust: too late to hard prune?
I've been away from the garden for over a month and have come back to my two Darcey Bussell roses absolutely covered in black spot/rust
There's lots of advice on the internet as to how to prevent or treat this, but little advice as to what to do if you're at the stage where the roses are in too bad a state to treat (which I think is the case here). Every single leaf I can see is affected... So what now...? Can I give them a hard prune at this stage to remove this year's leaves / growth and start again or is that too late at this point in the year? They were so beautiful and healthy throughout last year's hot summer too... the
Either way, it’s important to dispose of all pruned material and blackspotted leaves in the bin (don’t put them on your compost heap!) and make sure you remove all leaves and debris from underneath the plant too.
Scrape off an inch or two of the existing soil in a good circle around the rose, give it a really deep water - one or two full watering cans - work in a little rose food, then remulch with fresh compost. If the shrub looks a bit congested, prune out any crossing stems and open up the framework a little.
All the above will equally work for Gertrude!
The named ones I can remember doing it to are Tess of the D and Arthur Bell.