Control on arable land therefore is usually by use of a range of herbicides depending on the field crop grown.On grassland, cutting at flower stem extension but before opening of the flower buds will prevent seed spread for a particular season.Repeated cutting at the same growth stage over several years may "wear down" an infestation.MCPA herbicide applied during the early bud stage will kill the aerial parts of the plant, but repeat treatments the following year may be necessary for complete control. One application of the herbicide clopyralid* is normally sufficient to achieve an acceptable level of control. You may find that repeated digging out of roots reduces the problem, but chemical control will provide a quicker solution.Spreading roots mean that the thistles form large clumps of spiny leaves and flowering stems ranging from 30cm-1m (1ft-3¼ft) in height on mainly grassland.Dark pinky-purple flowers typical of the thistle family are borne July to September.The best time to apply weedkillers to thistles is when they are growing vigorously, but have not yet flowered. Creeping thistle, is the most important perennial thistle. Cirsium arvense commonly known as creeping thistle is a perennial species of flowering plant in the family Asteraceae.

We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place. It is native in cultivated fields, waste places, hedgerows and grassland throughout the UK and is recorded up to 2,300 ft. Tall (Cirsium altissimum), Flodmans (Cirsium flodmani) and field thistle (Cirsium discolor) are native to Iowa and far less prevalent than musk or bull thistle.
Despite being considered a 'weed' of cultivated ground, the seeds of the Creeping thistle provide an important food source for farmland birds, many of which are declining rapidly. They should be controlled if you wish to grow garden plants in the area, since they compete for light, water and food.
There is an old saying that ‘one year’s seeding is seven years weeding’.

The weed forms dense patches which suppress crop plants.Mature plants extend 30-100cm in height, with flowers from July into late autumn each year. I also see a lot of spear thistle in similar habitats, although when found in grassland, it's not as abundant as the creeping species. Spear thistle, creeping or field thistle, curled dock, broad-leaved dock, and ragwort are all listed as Injurious weeds under the “Noxious Weeds Order (NI) 1977” This act requires all land owners to prevent the spreading of injurious weeds. The weed forms dense patches which suppress crop plants.

Creeping thistle (Cirsium arvense) is a weed that spreads using lateral roots. Mature plants extend 30-100cm in height, with flowers from July into late autumn each year. Creeping thistle will grow in all manner of waste-ground, grasslands, verges and field edges. These roots are brittle and readily re-shoot if broken. Once established, it can be difficult to eradicate permanently. The plant is native to southeastern Europe and the eastern Mediterranean area, and was probably introduced to North America.

The root systems explain why; spear thistle has a tap root, whereas creeping thistle grows on rhizomes.

Creeping or field thistle (Cirsium arvense) Creeping thistle can quickly dominate vegetation in grassland or waste ground.

Creeping thistle | The Wildlife Trusts Skip to main content Keep track of your plants with reminders & care tips – all to help you grow successfullyCreeping thistle can quickly spread in grassland areas and borders. They can be controlled using non-chemical or chemical methods.The Royal Horticultural Society is the UK’s leading gardening charity. Digging up the plants can be done at any time of year.


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