Your access to this site has been limited by the site owner If you think you have been blocked in error, contact the owner of this site for assistance. If you are a WordPress user with Prickly lawn weeds are the worst. They don’t just ruin the aesthetic of your lawn - they’re darn painful to step on! I talk about the most common culprits here. Winter Weeds: Common Milkweed In late fall when I’m hiking near fields and roads I often see plants with big seed pods and white fluff tumbling out. The plants are milkweed but they look quite
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Prickly Lawn Weeds (7 Different Types)
It’s a brand new morning with the birds singing and a soft, gentle breeze. A hot cup of coffee sits in your hand, the steam and aroma waft up as you take a deep breath. You place your bare feet onto your soft, spongy turf then… ouch! You found a prickly lawn weed! When this happened to me, it meant war, and I set out to identify, research, and destroy every last spiky weed on my lawn.
Stick around while I identify different types of weeds with thorns and tell you how to get rid of each type of prickly weed you may find on your lawn.
Most Common Prickly Lawn Weeds (Short Answer)
Burr Medic, Goat Head Weed, and Lawn Burweed are low-growing prickly lawn weeds. Spiny Sowthistle and Spiny Cocklebur are high-growing spiky weeds you may see on your lawn that can release painful burrs you may never see. Carolina Horsenettle and Jimson Weed are nightshade relatives and are both weeds with thorns on their stems.
A Closer Look at the Different Prickly Lawn Weeds
Some weeds may give you a prick when you touch them, while others may stick into your flesh as you pass. One thing is for sure, none of them are good for your lawn. Anything that scratches, pokes, stabs, or slices needs to be removed from your turf ASAP.
Below I’m going to talk you through some of the most common types so you can identify and then hopefully remove them too, restoring order to your lawn.
Burr Medic (Medicago polymorpha)
What It Does: This lawn weed with thorns grows low and, sporting trifoliate leaves, blends in with clover in a yard. Burr medic puts up small yellow flowers in March and June and then produces seed pods. By late summer, the pods dry up and open, dumping several seeds across the turf. These pods have spikes that allow them to hitchhike and spread throughout your lawn.
What It Looks Like: Burr Medic is related to Black Medic and resembles Clover. It has a thin, smooth, red-purple stem and produces oblong, green leaves. The leaves alternate along the stem in groups of three. The leaf tips are serrated and appear sharper than other trifoliate weeds. These prickly lawn weeds produce yellow pea-shaped flowers that are arranged in clusters of 2 to 10. Seed pods are green to brown with a sharp hook.
How to Get Rid of It: You can remove a small patch of these spiky weeds by hand, but make sure you wear gloves. It is best to remove them when you see the yellow flowers before they drop seeds. If there is a larger area of Burr Medic, you can use a broadleaf herbicide to kill it.
Goat Head Weed (Tribulus Terrestris)
What It Does: A fast, low-to-the-ground prickly weed that can grow a dense, prostrate stem mat up to 5ft long. Goat Head Weed overtakes dry, damaged, and neglected areas and then creates tons of inconspicuous flowers. As these flowers die away, seed pods are formed with several pointy spikes. These barbs can grab onto anything and get spread far and wide. They grow a deep taproot that can be hard to separate from the turf.
What It Looks Like: Goat Head Weed goes through several lifecycle stages and can be hard to identify before it’s too late. In the early stages, on a lawn, it will be hard to see and identify. As it grows large, the stem will remain erect in a crowed area to compete for light. In the open, it will sprawl across the ground and not stand upright. When it blooms, you will see bright yellow flowers with 5 petals each, roughly the same size as the leaves of the weed. These spiky weeds on your lawn turn reddish-brown after they flower.
How to Get Rid of It: While there are many ways to kill this weed, its complete destruction and the removal of all seed burrs are very difficult. To kill the plant, you can burn it with fire until the mass above the taproot is charred. Vinegar with 5% acidity or higher and herbicides like glyphosate and oryzalin are also effective. Once the weed is dead, you can rake or pull an old carpet over the area to collect the dreaded Goat’s Heads.
Lawn Burweed (Soliva sessilis)
What It Does: Found in thin and patchy turf, these prickly weeds on your lawn can be a real nuisance. Lawn Burweed germinates in the fall and grows through the winter when turf may be dormant. When the temperature warms up in the spring, these weeds produce buried seed pods that are carried throughout the lawn all summer and cause a painful sting when stepped on.
What It Looks Like: Early detection is key to preventing these burrs from occupying your lawn. Burwood grows low and branches freely. It has small, grayish-green leaves that grow opposite and are sparsely hairy. It produces small, ¼ of an inch flowers that can go almost completely unnoticed on a lawn. These flowers are replaced by small spine-tipped burrs that are often felt rather than seen.
How to Get Rid of It: Maintaining a thick, lush lawn throughout the winter months will prevent prickly lawn weeds like Burweed. If you can identify it in winter, you can use post-emergence herbicide through December, January, and February. After that, it will be hard to control without killing your turf and you should pull up (with gloves) and rake what you can and plan to attack next winter.
Spiny Sowthistle (Sonchus asper)
What It Does: Not a true thistle, this spiky weed starts with a basal rosette that closely resembles thistles. Spiny Sowthistle grows in neglected areas and can get up to 6ft tall. The leaves of this plant are very prickly and the flowers develop from spiky buds. It exudes a milky sap when cut that is quite sticky. Accidentally hitting these prickly weeds on your lawn with a weed whacker can create a sticky, spiky mess.
What It Looks Like: Spiny Sowthistle resembles a spiky dandelion. It has similar leaves, albeit much more prickly, that are a similar bluish-green. It produces the same yellow flower and the same tuft of white seeds. It is much larger than a dandelion and spreads rapidly.
How to Get Rid of It: Manual removal of Spiny Sowthistle is possible if the area is small. Wearing gloves, full skin coverings, closed-toed shoes, and eye protection, you can dig out the roots of this weed in the spring before it flowers. To discourage regrowth, you can pour vinegar around the base of the weeds. For larger areas, you will need to apply 2,4D or glyphosate herbicide to each plant before it flowers. After the plant dies back, dig it up by the roots and reapply the herbicide into the hole where you removed the weed. Do this until they stop coming back.
Spiny Cocklebur (Xanthium spinosum)
What It Does: High-growing lawn weeds with thorns, these invaders can reach 3 and a half feet tall. They produce a deep taproot and take over dry, disturbed territory. When the flowers die, a two-chamber burr is released. Each burr has two seeds, one germinates that following spring but the other delays for 2 or more years. Complete removal is a multi-year process.
What It Looks Like: An erect stem with many branches, this tall annual has yellow, 3-parted spines. The leaves are lance-shaped, 2 inches long, and smooth on top. Each leaf is shiny, dark green, and has small white hairs on its underside. The flowers are inconspicuous cream to green in color and bloom from December to May.
How to Get Rid of It: Hand removal and chemical treatment are both effective ways to eliminate these prickly lawn weeds. For hand removal, you will want to wear full protective gear, as these weeds can irritate the skin. Pull up all Spiny Cocklebur and any seedlings and dispose of them – don’t compost the waste! You will need to repeat this each spring for the next few years. Mowing on your highest lawn setting once a week during the early spring and as frequently as needed during the late spring can prevent Cocklebur from producing seeds. A post-emergent herbicide applied at the start of the year can also be effective.
Carolina Horsenettle (Solanum carolinense)
What It Does: A member of the nightshade family, it is not a nettle but grows like one. It occupies dry and damaged turf. While the fruit of these weeds may look like tiny tomatoes, they are toxic to people and pets, and simply touching the plant can cause you to break out in rashes. They grow tall and emerge in spring when they choke out thin turf. Worst of all, they are lawn weeds with thorns on their stems and leaves.
What It Looks Like: Carolina Horsenettle looks like a spiky vine that creeps across the ground. They have prickly, oblong, dull green leaves that are about 2 to 6 inches long. These prickly weeds bloom from May to September and open between 5 and 20 pale violet, star-shaped flowers. The fruits look like little tomatoes, but turn from green to yellow and never turn red.
How to Get Rid of It: Getting rid of these types of weeds with thorns can be very tricky. It spreads by creeping roots and root fragments, as well as by seeds. Each plant can produce 5,000 seeds. Hand-pulling is not advised because of the long thorns that can penetrate even gloved hands. A glyphosate herbicide can be sprayed or painted onto the weeds. After the weeds die off in a few weeks, they must be dug up and another application of herbicide should be applied to the holes to kill any root fragments. Repeat as needed.
Jimson Weed (Datura stramonium)
What It Does: Another spiky relative of the tomato, Jimson Weed produces big poisonous fruits encased in a spiky shell. Jimson Weed can grow to several feet and produces flowers from May to September. They create spiky seed pods that burst open and spill hundreds of seeds all over the place.
What It Looks Like: A broadleaf annual, this prickly lawn weed can grow to 4ft tall. The leaves are lanced-shaped, oblong, and about 2in long. The colors of the stalks and stems of these weeds can range from green to purple. Each flowering stem produces a single white, trumpet-shaped flower that opens to around 2 inches.
How to Get Rid of It: While wearing gloves, you can hand pull Jimson Weed before it produces seeds. Place all yard waste in a bag and dispose away from your lawn. Repeated pulling of infested areas should yield a weed-free yard in a few seasons. A selective herbicide can be used to treat a larger area where this invasive plant is present.
About Tom Greene
I’ve always had a keen interest in lawn care as long as I can remember. Friends used to call me the “lawn mower guru” (hence the site name), but I’m anything but. I just enjoy cutting my lawn and spending time outdoors. I also love the well-deserved doughnuts and coffee afterward!
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Winter Weeds: Common Milkweed
In late fall when I’m hiking near fields and roads I often see plants with big seed pods and white fluff tumbling out. The plants are milkweed but they look quite different from their summer appearance.
Common milkweed is a conspicuous perennial in winter because its large, warty, seed pods stand high on three to five foot stems.
The pods are fat at the bottom, pointed at the top and split open on their long edge to reveal soft, silky fluff carefully layered inside. Each wad of silk is attached to a flat, brown seed.
When exposed to the weather the silk becomes fluffy and eventually flies off the plant, carrying its seed cargo as far as it will go. The pods stand high to send their bounty on the wind.
To me one of the great mysteries of milkweed is that it looks so different in winter. In summer it’s weighed down with large, drooping, pink flower umbels but now the pods stick up alone and there are far fewer of them than the number of flowers in the umbel. I have read that only one flower in each milkweed umbel produces a seed pod. (Do any of you know how this works?)
Common milkweed is a great plant for attracting monarch butterflies to your garden. If you already have milkweed you can leave the stems standing over the winter and watch where the seeds fly.
When you’re ready to clear them away in the spring, Marcy Cunkelman suggests you save the dried stems and put them out in mid-April for the birds to use as nesting material. The fibers are strong and peel off in strips. They’re quite a favorite of Baltimore orioles.
(photo by Marcy Cunkelman)
3 thoughts on “ Winter Weeds: Common Milkweed ”
I like milkweed, enjoyed looking for the plant. When I was in 3rd(Now here goes telling people “I am old”) our school was brought truckloads of burlap sacks to fill with milkweed pods because they were used to fill the vests the WW II GIs wore. We were all so proud doing it. This was when I lived in Gibsonia & one of the buildings you now see in a St. Barnabas Senior Community in Richland Twp. is actually our old grade school (talk about recycling!!). We had a chart in each classroom & I don’t know what the winner got, I suppose a party or something. So I always have fond memories about the milk weed. However, I did not know that the seeds were not in every pod. Some of these weeds are what keep winter in the woods interesting it seems. Everything for a purpose if only to enjoy.
I will look for pods in my fields to save for nesting material in April. Always enjoy your posts — the dried milkweed photo is great — barbara
I love milkweed too!
It smells great when the blossoms bloom. Also, when in bloom they attract a great variety of insects, bees, butterflies and the like. Monarchs and other insects make it their home for the summer season. Also, note, raising Monarch butterflies is great fun for kids and us adults too. And then, like Kate describes, gathering the silky pods in late fall for the birds in the spring for nesting material is an added bonus. So much to enjoy from a simple weed and it cost only some time.
That is the best thing about nature. It cost so little to enjoy so much. Everyday a great film is being played right outside your door. Every season brings a newly released feature film. Make some popcorn if you like and enjoy. Enjoy my friends, enjoy!