All three have flowers very similar to dandelions, so you might think they are just dandies with long, long stems. Like ...

Eryngoes, also called sea hollies, are perennial plants, occasionally annuals, with distinctive, bristly flower heads. They ...

Californian thistle (Cirsium arvense) is a common perennial thistle with an underground creeping root system.

Synthetic herbicides do translocate and kill the root system and may be the best method to manage large Canada thistle infestations.

Figure 6. Canada thistle root system after 14 months growth from 25 vegetative shoot cuttings (CSU Extension photo) Management ...

Canada thistle is harder to manage, as it lives multiple years and spreads by both seed and roots. The majority of the Canada thistle plant mass is in the roots, so managing with the root system ...

Thistle, especially Canada thistle, is a persistent weed that you'll need patience to control since you'll have to outlast its extensive root system.

Injuring and exhausting the root system by repeatedly hand pulling is a starting point. Spring and fall applications of glyphosate targeted to only thistle works well.

Injuring and exhausting the root system by repeatedly hand pulling is a starting point. Spring and fall applications of glyphosate targeted to only thistle works well.

Canada thistle is harder to manage, as it lives multiple years and spreads by both seed and roots. The majority of the Canada thistle plant mass is in the roots, so managing with the root system ...