How to Prune compass plant?
Cut back after flowering; stems may optionally be left until shortly before new growth begins the following season

compass plant · Silphium laciniatum
Also known as: gopher plant; pilot plant; pilot weed; polar plant; ragged cup; rosin weed
Grow in moderately fertile, moist, deep, neutral to slightly alkaline, heavy soil in full sun or partial shade
Cut back after flowering; stems may optionally be left until shortly before new growth begins the following season