Why has my 15 years plus Rose bush developed branches with very tightly clustered thorns

This has happened for two years now. I prune them off, but new shoots keep re-appearing with these same clustered thorns, and they do not produce flower buds at all.

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1 Comment To "Why has my 15 years plus Rose bush developed branches with very tightly clustered thorns"

#1 Comment By GKH_Susan On 01/25/2020 @ 9:38 pm

Oh dear. It sounds like rose rosette disease and there is no cure. It is best to remove the plant.

https://www.gardeningknowhow.com/ornamental/flowers/roses/rose-rosette-disease.htm ^[1]

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