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Also known as Barnaby’s thistle, golden starthistle, or yellow knapweed, it sends deep roots into the soil, depleting the moisture so no other plant species can establish. It outcompetes native ...
Milk thistle (Silybum marianum) can be a pain if it's growing in your yard.It's non-native and can be an invasive plant, as Keri Wilson, horticulturist and writer for Garden Media Group, points out, ...
Yellow star thistle, Centaurea solstitialis, is an invasive plant that we should try to eliminate. The plant is native to Eurasia, although it is believed it was brought to California from South ...
By Sharon Bokan. When we see a plant and it’s prickly, we automatically assume it is a thistle and therefore it is a bad plant. The Oxford Dictionary defines a thistle as “A widely distributed ...
There are 20 thistles native to Colorado, besides being prickly, they are desirable plants. Thistles are in the Asteraceae, sunflower (daisy) family.
Canada thistle (Cirsium arvense) is an aggressive, invasive plant. Here's how it spreads and how to identify it so it doesn't take over your garden.
Canada thistle (Cirsium arvense) was one such plant when we moved to Northeast Ohio five years ago.The blue-gray foliage of the rosette-shaped seedlings looked intriguing during spring, and in the ...
Contrary to its name, Canada thistle was actually introduced from Eurasia. Its highly aggressive manner crowds out native species and is difficult to control. This plant is targeted by Eagle County’s ...