Bull thistle (Cirsium vulgare ... However, in their birth year, bull thistles only show off a singular, 3-foot-wide rosette while they focus on growing their 28-inch-deep taproot.

Bull thistle, a member of the Asteraceae family, is yet another herbaceous biennial on our list of invasives. Unfortunately, bull thistle can flourish in an array of sites ranging from meadows, ...

typically grows 3-5 feet tall stalk-less leaves around 6 inches long, wavy, lobed leaves with yellow spines at each lobe stem is spineless, unlike the leaves and unlike bull ... dig rosettes and adult ...