Hello valerie and welcome to the forum What type of "black spots", do you have a photo?
It could be blackfly aphids which are easily wiped off by hand or washed off with a blast from a hosepipe. Could be a fungal infection, or simply a climate related change in leaf colour.
All speculation and guesswork based on common problems. Post a pic and we can see what's going on properly for best advice.
Sorry not able to upload photo. Not aphid but looks like fungal infection to me, getting more like blotches than spots now. what is your advice for this. Thanks.
I'm hesitant to offer advice for an unseen problem Valerie. Giving the wrong treatment advice could cause more harm than good.
Have you tried looking at any online images to find a match to your spots? Another possibility is sooty mould.? Are there any aphids at all on the plant, either black or green?
Valerie78
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What type of "black spots", do you have a photo?
It could be blackfly aphids which are easily wiped off by hand or washed off with a blast from a hosepipe.
Could be a fungal infection, or simply a climate related change in leaf colour.
All speculation and guesswork based on common problems. Post a pic and we can see what's going on properly for best advice.
Have you tried looking at any online images to find a match to your spots?
Another possibility is sooty mould.? Are there any aphids at all on the plant, either black or green?