Where are you located?

Jeri

You have a few options.

1. Remove the roses and plant a different type of plant altogether that doesn't get those spots.
2. Spray your roses periodically with fungicide to prevent spots. Fungicides are preventative, not curative, so you have to spray BEFORE the spots appear. Also, the fungicide only lasts so long, and so you need to spray on a regular basis. The Bayer Advanced Fungicide is often recommended.
3. Replace the roses with a couple of highly disease resistant varieties that can handle the disease pressure your climate presents. We can offer recommendations, but we must know your general location (not too specific, to preserve your privacy) so someone from nearby can advise you which roses would be best. E. G. state + area of state, for example Southern Texas, Florida Panhandle--that's specific enough. You may still get some spotted leaves, but perhaps not nearly as many as before--a level you can live with.

I'm in Houston. Here is a pic of their current state, which isn't pretty!! I pruned them back some but mostly just removed dead wood. Don't mind the weeds⦠we've yet to get to work out there this spring and the yard looks awful. :(

If you want to do a spray program then Rosemania has some good advice and protective gear. Please don't spray unless you are going to protect yourself. Blackspot is tough and needs tough chemicals to kill it. It hangs around on the stems and soil waiting to jump onto the leaves. Only certain sprays will kill it.

You can also encourage new vigorous growth of new leaves by feeding and watering, removing competing weeds and putting down a heavy mulch layer to cover up anything hanging around on the soil.

Some roses are more likely to get blackspot than others and some years are worse for blackspot than others.

Those of us who live in bad blackspot territory (which Houston is) have the choice of selecting from the most resistant 1% of roses (and you can't trust catalog claims) or spraying. Spraying the Bayer Advanced fungicide containing only tebuconazole will stop the disease and keep your roses clean, but only if you reapply every two weeks. The exact product name is Bayer Advanced Disease Control for Roses, Flowers, and Shrubs. Don't accept anything else. Get a one-gallon pump-up tank sprayer with a spray wand.

The other thing is pruning and training. Your climbers will look much better and bloom much more if the canes are arched semi-horizontally and tied down to the fence. Remove a fraction of the oldest canes each year to encourage production of new canes from the base. Give them fertilizer and water.