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

The botanical name for the national floral emblem of Scotland, the thistle, is Onopordum acanthium, and as we all know, thistle plants have sharp prickles.The sharp protrusions can be anywhere on ...

Q. I have Canada thistle growing in two of my flower beds, and I’m concerned about it spreading throughout my garden. I think I brought the seeds in on some manure I had delivered last spring.

Globe thistle’s pale purple to steel blue flowers, held high on stiff stems above coarse dark green foliage, are stealing the show this summer in gardens where they grow. Sea holly is a close ...