It can be devastating to farmland.
There's concern about the potential impact of black grass on farmland in the midlands.
It's found in packets of wildflower seeds which have become a popular choice for homeowners.
However the public are being asked only to plant them in pots because of the risk of birds or wind transporting them onto nearby farms.
Laois Fianna Fail cllr Paschal McEvoy says the process of removing it's very time consuming:
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