Musk thistle (Carduus nutans L.) is a common noxious weed in Nebraska. It is also known as nodding thistle. The deep reddish purple flowers are large and attractive. The head is solitary on the end of the stem and nods or hangs down as it grows in size.

Noxious weed is a legal term used to identify harmful weeds so they can be regulated. The Nebraska Director of Agriculture establishes which plants are noxious.

Noxious weeds are non-native plants that can reproduce quickly and take over an entire area.

If noxious weeds aren't controlled they can affect the production of crops, livestock and can even make land less valuable.

In order to control musk thistle, you must keep it from developing seeds. Each plant can produce up to 20,000 seeds.

Musk thistle is primarily a biennial weed and normally requires two growing seasons to complete its life cycle. The photo above shows the musk thistle in its rosette stage and as a mature plant.

Did you know?

June is Noxious Weed Awareness Month. Nebraska Governor Dave Heineman signed a proclamation declaring June as Noxious Weed Awareness Month, while recognizing the potential noxious weeds have to reduce Nebraska’s crop yields. MORE

Resources:

Weed Awareness Insert - NEBLINE

Musk Thistle - University of Nebraska Cooperative Extension

Lancaster County Weed Control Web site