#TurfKiller - Wild Parsnips

June 18, 2020
A close up of a plant with yellow flowers and green leaves

DESCRIPTION
Wild parsnip (Pastinaca sativa) is a biennial/perennial weed. When left unmanaged,  it can reach 4 to 6 feet tall. The plant bears clusters of large flowers called umbels that spout from a hallowed and grooved thick stem. The umbels are typically 2-6 inches wide and contain many small, 5-petaled yellow-green flowers that bloom from June to late August. The rosette leaves alternate along the stem, are pinnately compound, and are distinct by egg-shaped leaflets with saw-tooth edges that are arranged in pairs along the stalk. These leaves get increasingly smaller near the top of the stem. 

This weed is considered a biennial/perennial weed since it forms a rosette of basal leaves the first year, lives through winter, and then flowers the second year. Occasionally remaining in that rosette stage for more than a year like a perennial.

This plant will form a long thick taproot that is similar in appearance and smell to cultivated parsnips, hence the name. The roots are commonly smooth and cylindrical, but sometimes lateral roots will grow out from central taproot. Wild Parsnip can be confused with other similar-looking species like Golden alexander (Zizia aurea; native) or Prairie parsley (Polytaenia nuttallii; native). 

Wild Parsnip’s method of spreading is through distributing seeds. it’s seeds’ can remain viable for several years. If this highly invasive weed is ignored, it can spread rapidly and develop into large monocultures that replace native animal and plant habitat entirely.

A woman is standing in the grass next to a plant.

DAMAGE

Even well-established turf can be invaded-by-proxy as this weed can become established in landscapes or along wooded lots and distribute seeds in turfgrass areas. Once that infestation begins, it can form dense weeds in turf, fairways, fields or meadows and be very difficult to control without extensive mechanical or chemical control and appropriate PPE equipment to prevent injury from contact with plant.
Human health can also be impacted as this plant produces a compound in its leaves that when contacted with human skin in presence of sunlight will cause a rash that often leads to blisters and discoloration of the skin, known as phytophotodermatitus. If sap comes in contact with skin, avoid exposure to sunlight and immediately wash skin with soap and water. Seek medical attention, if required.

a man holds up his arms showing a rash caused by wild parsnips

MANAGEMENT

Wild parsnip is found in open places with reduced shade. Eliminating the seed production is going to be key in controlling the Wild Parsnip. Despite it being very labor-intensive, mechanical removal can be an effective control method, but only with appropriate PPE to prevent contact damage to skin or eyes.

 
If mechanical control is preferred, please take note that Wild Parsnip does not flower all at once, the affected area must be monitored closely for several weeks to prevent seed distribution. Mowing or cutting stands before flowering in June will eliminate the majority of the mature plants and drastically reduce seed production. Make sure to wash equipment after words to prevent movement of seeds to new areas. The rosettes and recently bolted stems that haven’t seed-set yet, may be controlled by severing the tap root 1-2 inches below the soil surface. Careful monitoring required to remove re-sprouts and recently germinated seedlings and rosettes. 

A picture of a plant with yellow flowers and a picture of a field with yellow flowers

PREVENTION

Management plans that combine early spring and late fall applications of a foliar herbicide with the active ingredients, metsulfuron, 2,4-D or Dicamba have been effective at managing this weed and any newly germinating plants. Complete eradication may take a few years as Wild Parsnip seeds are very viable. Any regrowth to affected lawn area will also help prevent another infestation as more vegetation grows to compete for nutrients and reduces where the weed can reestablish itself.


Essentially, the less space there is for Wild Parsnips to grow, the less likely they are to reestablish in your turf. Healthy, full turf will help prevent the growth of this weed and many others. To stave off disease and weeds, you should adopt a seasonal fertilizer program to ensure your turf has the nutrients required to stay dense and strong. For professional fertilizers with herbicides to prevent and control weeds, please visit TurfCare’s online 
Product Catalog. For green industry professionals or others interested in ordering Turfcare products, please contact our  Customer Service to find a distributor near you.

The TURFReport Highlights:

Additional Articles and Insights

January 30, 2026
White Plains, NY – January 30, 2026 – Interoceanic Corporation (“IOC”) announced today that its affiliate Spring Valley USA (Spring Valley) , has acquired the blending and packaging assets and business of Turf Care Supply, LLC, a leading manufacturer and blender of turf and ornamental fertilizers as well as ice melt. The combination of Spring Valley and Turf Care Supply’s blending business, forms one of the largest independent lawn and garden fertilizer platforms in North America. The integrated business will have approximately 250 employees and will operate eight manufacturing and blending facilities across seven states, enabling coast-to-coast coverage of customers. By uniting two highly complementary companies, this acquisition creates a world-class turf & ornamental supply company positioned to deliver enhanced value to both professional and retail customers. “This acquisition is a transformative step for our organization,” said Elio Mazzella , President of IOC and Spring Valley. “By bringing Turf Care Supply into the IOC family, we are significantly expanding our reach and capabilities in serving the lawn and garden industry. The combined company will have an unrivaled production footprint and product portfolio, which means we can offer our customers faster service, greater efficiency, and innovative solutions on a national scale. Our goal is to build a world-class platform that blends the strengths of both businesses – the supply chain efficiencies of the combined business and the family-business values – will drive growth for our customers and vendor partners.” With the closing of the transaction, Turf Care Supply, LLC will be renamed Allied Nutrients and continue to manufacture leading enhanced efficiency fertilizers (“EEF”) out of its Martins Ferry, Ohio facility. Mark Mangan, President of Allied Nutrients, commented, “we want to thank our long-time employees that will be joining the IOC family and wish them well. We have known the IOC team for many years and believe this will be a great home. At the same time, we are excited for our remaining employees as we focus our resources and efforts on providing the best EEF solutions to the turf and ornamental market.” With this acquisition, the combined company now operates manufacturing facilities in Wisconsin, Ohio, Texas, Florida, Massachusetts, Tennessee, and Oklahoma, giving it the ability to blend and package fertilizer products and ice melt closer to customers in every major region. Turf Care Supply’s sites in Hatfield (MA), Sebring (FL), Cleveland (TN), and Catoosa (OK) will join Spring Valley’s existing plants in Jackson (WI), Fostoria (OH), Greenville (TX), and Longwood (FL). This expanded footprint significantly reduces transit times and enhances supply reliability for our customers. Maintaining strong customer relationships during and after the integration is a top priority. “All of our customers will continue to receive the outstanding service and product quality they expect, now with the added benefit of a truly national production network,” Mazzella added. Each major customer will be supported by an expanded team dedicated to ensuring a seamless transition and ongoing success. Strategically, the merger of Spring Valley and Turf Care Supply unlocks significant commercial synergies that will benefit both our customers and vendor partners. Together, the company will offer the most comprehensive product portfolio in the industry. “This combination is about building a platform that is perfectly suited to support our customers growth,” said Mazzella. “By combining our R&D and product development efforts, we intend to bring new, high-value solutions to market that neither company could have achieved alone.” The integration of the two businesses is already underway, with a focus on maintaining operational continuity and exceptional customer service throughout the spring season. The company also emphasized that all Turf Care Supply employees are being welcomed into the organization, and that the combined workforce will play a crucial role in driving the business forward. “This is an exciting moment for all of us. By uniting two great teams, we’re creating a stronger company with a shared commitment to our customers’ and vendors success, ” Mazzella noted. About Interoceanic Corporation (IOC): Based in White Plains, NY, IOC is a diversified family-owned company specializing in the production, marketing, and distribution of fertilizer and industrial chemical products. Other notable affiliates of IOC are PCI Nitrogen, Columbia River Nitrogen and EM² Enterprises. With this transaction, the group of businesses consist of over 600 employees. IOC’s family values, entrepreneurial spirit, and supply chain expertise have driven its growth from a regional fertilizer distributor into an international platform that provides reliable, high-quality products. About Allied Nutrients: Based in Brunswick, OH, Allied Nutrients specializes in providing enhanced efficiency fertilizers that support turfgrass and ornamental plant health. Through world-class manufacturing and research and development, the company offers a comprehensive portfolio of products, including SCU, PCU, PCSCU, reacted slow-release nitrogen, and urease inhibitors. These solutions are marketed under leading brands, such as XCU, TTRU, UFLEXX, UMAXX, Nutralene, and Nitroform. 
The hidden cost of filler: how to maximize your fertilizer ROI. Shows hand holding filler .
January 22, 2026
Want to maximize your ROI and turf health? Ditch the filler and replace your blends with Enhanced Efficiency Fertilizers (EEFs), Micro packs, Soil Amendments, or organic materials. These alternatives can reduce your seasonal application of bags, reduce overall material cost and deliver better results!
A large fertilizer manufacturing facility
April 18, 2025
Turf Care Supply, LLC, a portfolio company of Platte River Equity, has officially acquired Beaty Fertilizer, the industry respected Tennessee-based manufacturer and blender of custom granular and liquid fertilizers, as well as combination products. This strategic move expands Turf Care’s manufacturing footprint, adds new product capabilities, and enhances overall production capacity.
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April 18, 2025
Root out Grubs, Before they Attack Yours!
October 9, 2024
Platte River Equity Portfolio Company Turf Care Supply, LLC Acquires Agri-Nutrients, Inc.
October 4, 2024
Dear Valued Industry Partners and Customers, We are pleased to announce that Turf Care Supply, LLC has acquired Agri-Nutrients, Inc. (October 1, 2024) a respected manufacturer in the turf and ornamental fertilizer industry. This acquisition marks a significant step forward in our commitment to providing you with an expanded range of innovative products, services, and industry expertise, all designed to support your business’s continued growth and success. As a valued partner or customer, you will benefit from enhanced service capabilities and an extended geographic reach, thanks to Agri-Nutrients, Inc.’s strategic facility located in the Port of Catoosa, Oklahoma. With this established presence in the Southwest and Western markets, Turf Care Supply, LLC’s expanded operational footprint will allow us to serve a broader region with greater efficiency, delivering even stronger support to help drive your business forward. We are dedicated to ensuring a seamless transition while maintaining the high standards of service you expect. If you have any questions or would like to explore how this new location can enhance your operations, please feel free to contact your account manager or our customer service team. Thank you for your continued trust in Turf Care Supply, LLC . We look forward to partnering with you as we grow together and continue supporting your success. Sincerely, Mark ManganPresidentTurf Care Supply, LLC
A forklift is sitting in a garage next to another forklift.
September 28, 2023
With a focus on providing sustainable manufacturing and reducing carbon emissions, Turf Care Supply has embraced the electric power market with the latest mobile equipment upgrades. Completed in June 2023, TCS received all deliveries of electric forklifts to all three manufacturing facilities, including Hatfield, MA, Martins Ferry, OH and Sebring, FL.
A person is holding a safety data sheet in front of bottles
July 19, 2023
When handling fertilizers and pesticide it is important to follow suggested guidelines and prioritize safety to protect yourself, others, and reduce environmental impact. Here are some general measures to follow: 1.Read and Follow Instructions: Carefully read and understand the product labels, safety data sheets (SDS), and any accompanying instructions provided by the manufacturer. Follow all recommended guidelines, precautions, and application rates.
A tur care advertisement for fertilizer application tips
June 22, 2023
It’s common knowledge that applying too much fertilizer containing high percentages of readily available nitrogen and water soluble nutrients can result in burn damage to plants, but did you know that damage can still occur even if your application rate is correct? Applying the right product at the right rate, but at the WRONG time can have disastrous consequences.
Show More
January 30, 2026
White Plains, NY – January 30, 2026 – Interoceanic Corporation (“IOC”) announced today that its affiliate Spring Valley USA (Spring Valley) , has acquired the blending and packaging assets and business of Turf Care Supply, LLC, a leading manufacturer and blender of turf and ornamental fertilizers as well as ice melt. The combination of Spring Valley and Turf Care Supply’s blending business, forms one of the largest independent lawn and garden fertilizer platforms in North America. The integrated business will have approximately 250 employees and will operate eight manufacturing and blending facilities across seven states, enabling coast-to-coast coverage of customers. By uniting two highly complementary companies, this acquisition creates a world-class turf & ornamental supply company positioned to deliver enhanced value to both professional and retail customers. “This acquisition is a transformative step for our organization,” said Elio Mazzella , President of IOC and Spring Valley. “By bringing Turf Care Supply into the IOC family, we are significantly expanding our reach and capabilities in serving the lawn and garden industry. The combined company will have an unrivaled production footprint and product portfolio, which means we can offer our customers faster service, greater efficiency, and innovative solutions on a national scale. Our goal is to build a world-class platform that blends the strengths of both businesses – the supply chain efficiencies of the combined business and the family-business values – will drive growth for our customers and vendor partners.” With the closing of the transaction, Turf Care Supply, LLC will be renamed Allied Nutrients and continue to manufacture leading enhanced efficiency fertilizers (“EEF”) out of its Martins Ferry, Ohio facility. Mark Mangan, President of Allied Nutrients, commented, “we want to thank our long-time employees that will be joining the IOC family and wish them well. We have known the IOC team for many years and believe this will be a great home. At the same time, we are excited for our remaining employees as we focus our resources and efforts on providing the best EEF solutions to the turf and ornamental market.” With this acquisition, the combined company now operates manufacturing facilities in Wisconsin, Ohio, Texas, Florida, Massachusetts, Tennessee, and Oklahoma, giving it the ability to blend and package fertilizer products and ice melt closer to customers in every major region. Turf Care Supply’s sites in Hatfield (MA), Sebring (FL), Cleveland (TN), and Catoosa (OK) will join Spring Valley’s existing plants in Jackson (WI), Fostoria (OH), Greenville (TX), and Longwood (FL). This expanded footprint significantly reduces transit times and enhances supply reliability for our customers. Maintaining strong customer relationships during and after the integration is a top priority. “All of our customers will continue to receive the outstanding service and product quality they expect, now with the added benefit of a truly national production network,” Mazzella added. Each major customer will be supported by an expanded team dedicated to ensuring a seamless transition and ongoing success. Strategically, the merger of Spring Valley and Turf Care Supply unlocks significant commercial synergies that will benefit both our customers and vendor partners. Together, the company will offer the most comprehensive product portfolio in the industry. “This combination is about building a platform that is perfectly suited to support our customers growth,” said Mazzella. “By combining our R&D and product development efforts, we intend to bring new, high-value solutions to market that neither company could have achieved alone.” The integration of the two businesses is already underway, with a focus on maintaining operational continuity and exceptional customer service throughout the spring season. The company also emphasized that all Turf Care Supply employees are being welcomed into the organization, and that the combined workforce will play a crucial role in driving the business forward. “This is an exciting moment for all of us. By uniting two great teams, we’re creating a stronger company with a shared commitment to our customers’ and vendors success, ” Mazzella noted. About Interoceanic Corporation (IOC): Based in White Plains, NY, IOC is a diversified family-owned company specializing in the production, marketing, and distribution of fertilizer and industrial chemical products. Other notable affiliates of IOC are PCI Nitrogen, Columbia River Nitrogen and EM² Enterprises. With this transaction, the group of businesses consist of over 600 employees. IOC’s family values, entrepreneurial spirit, and supply chain expertise have driven its growth from a regional fertilizer distributor into an international platform that provides reliable, high-quality products. About Allied Nutrients: Based in Brunswick, OH, Allied Nutrients specializes in providing enhanced efficiency fertilizers that support turfgrass and ornamental plant health. Through world-class manufacturing and research and development, the company offers a comprehensive portfolio of products, including SCU, PCU, PCSCU, reacted slow-release nitrogen, and urease inhibitors. These solutions are marketed under leading brands, such as XCU, TTRU, UFLEXX, UMAXX, Nutralene, and Nitroform. 
The hidden cost of filler: how to maximize your fertilizer ROI. Shows hand holding filler .
January 22, 2026
Want to maximize your ROI and turf health? Ditch the filler and replace your blends with Enhanced Efficiency Fertilizers (EEFs), Micro packs, Soil Amendments, or organic materials. These alternatives can reduce your seasonal application of bags, reduce overall material cost and deliver better results!
A large fertilizer manufacturing facility
April 18, 2025
Turf Care Supply, LLC, a portfolio company of Platte River Equity, has officially acquired Beaty Fertilizer, the industry respected Tennessee-based manufacturer and blender of custom granular and liquid fertilizers, as well as combination products. This strategic move expands Turf Care’s manufacturing footprint, adds new product capabilities, and enhances overall production capacity.
grubs on dirt
April 18, 2025
Root out Grubs, Before they Attack Yours!
October 9, 2024
Platte River Equity Portfolio Company Turf Care Supply, LLC Acquires Agri-Nutrients, Inc.
October 4, 2024
Dear Valued Industry Partners and Customers, We are pleased to announce that Turf Care Supply, LLC has acquired Agri-Nutrients, Inc. (October 1, 2024) a respected manufacturer in the turf and ornamental fertilizer industry. This acquisition marks a significant step forward in our commitment to providing you with an expanded range of innovative products, services, and industry expertise, all designed to support your business’s continued growth and success. As a valued partner or customer, you will benefit from enhanced service capabilities and an extended geographic reach, thanks to Agri-Nutrients, Inc.’s strategic facility located in the Port of Catoosa, Oklahoma. With this established presence in the Southwest and Western markets, Turf Care Supply, LLC’s expanded operational footprint will allow us to serve a broader region with greater efficiency, delivering even stronger support to help drive your business forward. We are dedicated to ensuring a seamless transition while maintaining the high standards of service you expect. If you have any questions or would like to explore how this new location can enhance your operations, please feel free to contact your account manager or our customer service team. Thank you for your continued trust in Turf Care Supply, LLC . We look forward to partnering with you as we grow together and continue supporting your success. Sincerely, Mark ManganPresidentTurf Care Supply, LLC
A forklift is sitting in a garage next to another forklift.
September 28, 2023
With a focus on providing sustainable manufacturing and reducing carbon emissions, Turf Care Supply has embraced the electric power market with the latest mobile equipment upgrades. Completed in June 2023, TCS received all deliveries of electric forklifts to all three manufacturing facilities, including Hatfield, MA, Martins Ferry, OH and Sebring, FL.
A person is holding a safety data sheet in front of bottles
July 19, 2023
When handling fertilizers and pesticide it is important to follow suggested guidelines and prioritize safety to protect yourself, others, and reduce environmental impact. Here are some general measures to follow: 1.Read and Follow Instructions: Carefully read and understand the product labels, safety data sheets (SDS), and any accompanying instructions provided by the manufacturer. Follow all recommended guidelines, precautions, and application rates.
Show More