How to Prune rayed tansy?
No pruning required; deadhead if seed is not required

rayed tansy · Tanacetum macrophyllum
Also known as: tansy chrysanthemum
Thrives in moist but well-drained, humus-rich soils, but will tolerate a range of conditions including poor, dry soils where it will spread more slowly. May benefit from some early afternoon shade in warmer areas
No pruning required; deadhead if seed is not required