Servicing the Mpls/St. Paul metro through 5 area offices:    Eden Prairie (952) 941-2900 | Burnsville (952) 890-6655
Woodbury (651) 735-4422 | Plymouth (763) 383-7655
New Brighton (651) 633-9892



 Manage account view proposal


Estimates List - Whats This?

Estimates List is Empty


Joan from New Brighton says:

05/02/11 06:10 PM

I have used Guaranteed since the early 90's and I have enjoyed watching there company grow without compromising the service they have provided to us! we love supporting our local companies


View all Testimonials

Refer a Neighbor... or a Friend

Receive one free Fertilizer and Weed control application on your next service when you refer a neighbor or a friend to Guaranteed Turf Care and they sign up for our Nature Green or Weekender Mowing program.

Thistles are warm season broadleaf weeds that can be a nuisance in many Minnesota lawns. There are two different types of thistle: perennial and biennial. The most common biennial thistles in our area are the bull and plumeless. The most common perennial thistle in our area is the Canadian thistle. Biennial thistles can be controlled by digging and cultivation; however, this is more difficult with perennial thistles because they spread by creeping underground stems (rhizomes).

Biennial thistles live for two years. The first year they form a low-growing rosette of leaves, and the second year a taller, flower and seed bearing stem. Biennial thistles are most effectively controlled the first year when they are in the rosette stage.

Bull thistle reproduces by seed and can be found throughout Minnesota. The stem is heavily branched and may be 2 to 4 feet tall. Leaves are green on both upper and lower leaf surfaces (the lower surface somewhat paler than the upper surface) with yellow tipped spines. Leaf bases run down the stem giving it a winged appearance. Compact rose to reddish purple flower head, 1 to 2 inches in diameter, bloom from June through September.  


Plumeless thistle may be found in most areas in Minnesota, except in the northeast arrowhead. The stem (3 to 6 feet tall) is erect. Leaves are deeply divided with alternate lobes ending in white to yellowish spines. Leaves at the base of the plant and lower stem are large and decrease in size as they progress up the stem. Leaf hairs are scattered on the upper surface, but are denser on the lower surface especially along the mid-vein. Single or loosely clustered, reddish-purple flowers are globe-shaped, 0.5 to 1 inch in diameter, with spiny wings to the base. Flowers bloom in late May through early July.   



Perennial Thistles come back each year from roots that survive the winter. They bloom and seed every year. The most common is the Canadian thistle. Canada thistle reproduces both by rhizomes and from seed. Roots can extend horizontally and vertically several feet. Stems are 2 to 5 feet tall, branching only at the top. Leaves are somewhat lobed and crinkled at the edges with spiny margins. Numerous, compact, lavender disk flowers, 3/4 inch or bracts surround less in diameter.  
The most effective way to remove thistles is through the use of herbicides. Broadleaf herbicides containing 2,4-D and MCPP can have good success in controlling thistles in lawns. Herbicides must be applied when weeds are actively growing and air temperatures are roughly 60º to 85º F. The best times to control weeds are in the spring (late April through mid-June) and the fall (September through mid-October).    


Your are currently browsing this site with Internet Explorer 6 (IE6).

Your current web browser must be updated to version 7 of Internet Explorer (IE7) to take advantage of all of template's capabilities.

Why should I upgrade to Internet Explorer 7? Microsoft has redesigned Internet Explorer from the ground up, with better security, new capabilities, and a whole new interface. Many changes resulted from the feedback of millions of users who tested prerelease versions of the new browser. The most compelling reason to upgrade is the improved security. The Internet of today is not the Internet of five years ago. There are dangers that simply didn't exist back in 2001, when Internet Explorer 6 was released to the world. Internet Explorer 7 makes surfing the web fundamentally safer by offering greater protection against viruses, spyware, and other online risks.

Get free downloads for Internet Explorer 7, including recommended updates as they become available. To download Internet Explorer 7 in the language of your choice, please visit the Internet Explorer 7 worldwide page.