Milk thistle (Silybum marianum ... Milk thistles' large, spiny, dark-green leaves have white marbling, which is where the plant gets its common name from, explains Amy Enfield of ScottsMiracle ...

The Yakima County Noxious Weed Board has been helping landowners control problem and noxious weeds since 1975. Contact them at 509-574-2180, email [email protected] or visit ...

Canada thistle can be found in clay to gravelly soils. 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, ...

When it comes to invasive weeds that can be difficult to remove, a few thistle species rise to the top of the list. According ...

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 ...

Scotch thistle is the most common thistle species in New Zealand with spines on both the leaf surface and margins. Scotch thistle is a biennial weed, so it depends quite heavily on the establishment ...

European marsh thistle frequently invades fens, wetlands, and disturbed sites such as roadside ditches. Identifying features include: typically grows 2-7 feet tall leaves are alternate with deeply ...