Lack of vigour. Fewer/poorer quality flowers. Detrimental impact on root or tuber formation. Many weak/thin stems. Shorter growing plants. Easily spreadable to other commonly grown herbaceous perennials such as heuchera, the aster family, etc. Easily transmitted through taking cuttings and splitting plants - offspring will also be affected. Plants may be affected before symptoms become evident.
There is no cure for leafy gall but mitigating measures can be taken. Each to their own in their personal tolerance to the ‘problem’.
I'll see how it goes this year from scratch as there were certainly no issues with vigour or growth last year.
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