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

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

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.

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 is ...

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 has an extensive root system. When dug out, many small roots break off and consequently more thistles appear. Injuring and exhausting the root system by repeatedly hand pulling is a ...

Californian thistle is one of the most common thistle species in New Zealand. It is very troublesome in pastures because it is so difficult to control. Once a plant is established in pasture, it forms ...

Thistle has an extensive root system. When dug out, many small roots break off and consequently more thistles appear. Injuring and exhausting the root system by repeatedly hand pulling is a ...

When we see a prickly plant we assume it's a thistle and therefore a bad plant, but 20 thistles native to Colorado are desirable plants. Skip to content. All Sections. Subscribe Now.