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Top Lawn Fertilization & Weed Control in Longmont, Colorado Ranked

Maintaining a vibrant, healthy lawn in Longmont requires a tailored approach that addresses the unique needs of Colorado's Front Range climate. Lawn fertilization and weed control are essential services that provide your grass with the nutrients it needs to thrive while suppressing invasive plants that compete for resources. A professional treatment program takes the guesswork out of timing and product selection, ensuring your lawn receives the right care at the right time throughout the growing season. This guide will help you understand the local lawn care landscape, from grass types to treatment schedules, so you can make informed decisions for your property.

Weed Man Lawn Care

Weed Man Lawn Care

11427 W Interstate 70 Frontage Rd, Wheat Ridge, CO 80033

Weed Man Lawn Care is a lawn care company serving Denver, CO. They offer services including lawn fertilization, weed control, aeration, and pest management to improve lawn health and appearance. With over 50 years of experience, Weed Man uses proven methods tailored to Denver's soil and climate conditions to maintain healthy lawns.

5.0
190 Reviews
Happy Roots

Happy Roots

11727 Salem St, Henderson, CO 80640

Happy Roots is a family-owned lawn care company based near Denver, CO, serving the northern suburbs with lawn, landscape, and sprinkler services. Established in 2005 in Thornton, Colorado, they offer lawn mowing, fertilization, weed control, landscaping, and sprinkler installation and repair. The company emphasizes personalized service and has been recognized for its lawn care and customer service, including multiple Angie's List Super Service Awards and a Dave Ramsey Entreleadership scholarship.

4.9
181 Reviews
Colorado Sprinkler Repair

Colorado Sprinkler Repair

12412 York St, Thornton, CO 80241

Colorado Sprinkler Repair is a family-owned lawn care and sprinkler service company based in Denver, CO. They provide a range of services including sprinkler system installation, repair, maintenance, lawn mowing, fertilization, aeration, weed control, and landscaping for both residential and commercial properties. With nearly three decades of experience, they focus on helping customers maintain healthy lawns in the semi-arid climate of the North Denver Metro area. Their expertise includes commercial irrigation and sprinkler blowout services, and they offer convenient packages combining sprinkler and lawn care. The company guarantees repairs at no extra cost if issues arise after service and commits to responding to customer requests within 24 business hours.

5.0
61 Reviews
A Cut Above Landscape

A Cut Above Landscape

6669 Colorado Blvd, Commerce City, CO 80022

A Cut Above Landscape is a lawn care and landscaping company based in Denver, CO. They offer a range of services including lawn mowing, fertilization, weed control, sprinkler installation and repair, irrigation services, and general landscaping maintenance. With over 30 years of experience, they serve homeowners, communities, and businesses in the area. Their capabilities include irrigation audits and upgrades, along with seasonal services such as snow removal and holiday display installation. The company provides self-service scheduling and automated notifications to keep clients informed throughout the process.

4.7
818 Reviews
Green Team Denver

Green Team Denver

aurora

Green Team Denver is an eco-friendly lawn care company serving Aurora, CO, and the surrounding Denver area. They offer full-service lawn care using quiet, electric mowers and organic, pet-safe fertilizers to maintain healthy, chemical-free lawns. Their services include weekly lawn mowing, edging, string trimming, aeration, overseeding, fertilization, soil conditioning, and sprinkler system maintenance. Founded by Jake Cox, who has over six years of experience and a background in environmental education, the company focuses on sustainable lawn care solutions that prioritize family and pet safety.

5.0
32 Reviews
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Understanding Longmont's Lawn Grasses

The foundation of effective lawn nutrition and weed management is knowing what type of grass you have. The majority of residential lawns in Longmont are cool-season grasses, which are best suited to the region's climate and have distinct growth cycles 1 2. Here are the most common varieties you'll find:

  • Kentucky Bluegrass: This is the most popular choice for Longmont lawns. It creates a thick, dense, and attractive turf that can handle heavy foot traffic. It spreads via underground stems called rhizomes, which allows it to self-repair damaged areas. A key characteristic is that it will go dormant and turn brown during periods of high summer heat if not adequately watered 3 1.
  • Tall Fescue: Gaining popularity for its resilience, Tall Fescue has a deeper root system that provides better drought tolerance compared to Kentucky Bluegrass, often requiring less water. While individual blades are coarser, it forms a robust lawn when mowed regularly 3 4.
  • Fine Fescue: Often found in seed blends, Fine Fescue varieties excel in shaded areas and soils with lower fertility. They are a good option for parts of the yard that don't get full sun 1 5.
  • Perennial Ryegrass: Prized for its very quick germination, ryegrass is frequently included in seed mixes to provide rapid cover and fill in bare spots while slower-growing grasses establish 4.
  • Native Grasses (Buffalograss/Blue Grama): For those seeking a low-maintenance, water-wise option, these warm-season native grasses are extremely drought-resistant and require minimal mowing. It's important to note they have a different seasonal cycle, remaining dormant and brown from fall through late spring, which differs from the traditional green lawn aesthetic many homeowners desire 5 6.

The Professional Lawn Care Program Schedule

A systematic, season-long approach is what sets professional lawn feeding and weed management apart. Most local programs consist of 6 to 7 scheduled visits from April through October, with treatments timed to match the natural growth pulses of cool-season grasses 7 8 9.

Early Spring (April)

This kick-off visit is critical for setting up a weed-free season. The focus is on applying a granular fertilizer to fuel early green-up and a pre-emergent herbicide. This pre-emergent creates a barrier in the soil that prevents weed seeds, particularly annual pests like crabgrass, from germinating. This is also the ideal time for core aeration, a process that removes small plugs of soil to relieve compaction, improve water infiltration, and allow fertilizer to reach the root zone more effectively 7 10 11.

Late Spring to Early Summer (May-June)

As temperatures rise, the focus shifts to managing any weeds that have emerged. Post-emergent weed control targets visible weeds like dandelions and clover. A balanced fertilizer application or soil conditioner is also typical during this visit, designed to strengthen the lawn and build resilience before the stress of summer heat sets in 7 12.

Mid-Summer (July-August)

Summer treatments are often lighter, focusing on sustaining the lawn through heat stress. This may involve spot-treating persistent weeds and applying a fertilizer with essential micronutrients to maintain color and health. Proper irrigation management is emphasized during this period, as consistent watering is key to preventing drought damage 12.

Fall (September-October)

Fall is arguably the most important season for nurturing cool-season grasses in Colorado. Treatments are designed to recover from summer stress and prepare the lawn for winter. A second round of core aeration and overseeding is highly beneficial to thicken the turf and crowd out future weeds. The final application is a "winterizer" fertilizer, which is high in potassium. This promotes vigorous root growth and nutrient storage, ensuring the grass survives the winter and greens up quickly the following spring 7 10 11.

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Cost Considerations for Lawn Treatment Services

Investing in professional lawn nutrition and weed suppression involves several variables. Pricing in Longmont is typically influenced by lawn size (measured in square feet), the number of annual visits, and the type of products used (e.g., standard synthetic vs. organic options) 13 14.

  • Per Application Cost: A single treatment for fertilization and weed control typically ranges from $50 to $80 15 16.
  • Annual Program Cost: A comprehensive annual program, which usually includes 6-7 visits and often incorporates services like aeration, generally ranges from $250 to over $700 per year for an average-sized yard 7 15 13. The final price depends on the specific services included, such as grub control or specialized soil amendments.
  • DIY vs. Professional: A do-it-yourself approach can be more cost-effective per treatment. However, it requires knowledge of local soil conditions-conducting a soil test through the CSU Extension is highly recommended-and precise timing of applications to be truly effective. Mistakes in product choice or timing can lead to poor results, weed breakthroughs, or even lawn damage 17 18.

For the most accurate estimate, contacting local lawn care providers for a property assessment is the best step 19.

Key Benefits of a Managed Program

Beyond a green lawn, a professional fertilization and weed control regimen offers tangible advantages:

  • Healthier Root Systems: Properly timed nutrients, especially fall winterizers, encourage deep root growth, which improves drought tolerance and overall plant vigor.
  • Proactive Weed Defense: The combination of pre-emergent in spring and targeted post-emergent treatments stops weed infestations before they start and manages breakthroughs effectively.
  • Time and Convenience: It eliminates the need to research products, calculate application rates, store chemicals, and spend your weekends on lawn care tasks.
  • Expert Knowledge: Professionals understand the local climate, soil pH common to the area, and the specific weed pressures in Longmont, applying the right solution at the optimal time.

Frequently asked questions

Sources

Footnotes

  1. Different Grasses for Colorado Lawns - Green Valley Turf, Residential - https://gvt.net/different-grasses-colorado-lawns/ 2 3

  2. Lawn Care in Longmont, CO from $55 | 6000+ 5-Star Reviews - https://www.getsunday.com/local-guide/lawn-care-in-longmont-co

  3. 5 Types of Grass in Colorado | Integrated Lawn Care - https://healthylawn.net/blog/types-of-grass-in-colorado/ 2

  4. Best Grass Types for Lawns in Southeast Denver - https://www.heroeslawncare.com/southeast-denver-co/about/blog/categories/lawn-care/what-are-the-grass-types-that-thrive-in-southeas/ 2

  5. The Best Grass Seed For Colorado - https://naturesseed.com/resources/lawn-turf/colorado/ 2

  6. Blue Grama - Colorado Springs Utilities - https://www.csu.org/water-wise-plants/blue-grama

  7. Lawn Care Program | Longmont, Niwot & Frederick, CO - https://totalturflawncare.com/services/lawn-care/lawn-care-program/ 2 3 4 5

  8. Lawn Fertilization Service | Longmont, Niwot & Frederick, CO - https://totalturflawncare.com/services/lawn-care/lawn-fertilization

  9. How to fertilize new sod: 7 Powerful Tips for Success 2025 - https://stevesservicesllc.com/how-to-fertilize-new-sod/

  10. Lawn Fertilization Service | Longmont, Niwot & Frederick, CO - https://totalturflawncare.com/services/lawn-care/lawn-fertilization 2

  11. When To Fertilize The Lawn In Colorado - https://erbertlawns.com/lawn-care-tips/when-to-fertilize-the-lawn-in-colorado/ 2

  12. A Complete Colorado Lawn Care Schedule - https://healthylawn.net/blog/complete-colorado-lawn-care-schedule/ 2

  13. Landscape Maintenance Cost in Colorado: Budgeting ... - https://www.easygreenlandscaping.net/landscape-maintenance-cost/ 2

  14. How Much Does Lawn Fertilization Cost in 2026? - https://lawnlove.com/blog/lawn-fertilization-cost/

  15. Lawn Care Pricing Chart: Your Guide to Fair Lawn Service Costs - https://invoicefly.com/academy/lawn-care-pricing-chart/ 2

  16. The Cost of Lawn Treatment Services - Fertilizer, Weed Control, and ... - https://www.lawnbuddies.com/blog/cost-of-lawn-treatment-services-fertilizer-weed-control

  17. Denver, CO Lawn Treatment & Fertilization | Weed Control - https://www.lawnstarter.com/denver-co-lawn-treatment

  18. Lawn Care Schedule For Cool Season Grasses - https://www.domyown.com/lawn-care-schedule-for-cool-season-grasses-a-539.html

  19. Essential Lawn Care Tips for Longmont Residents - https://grantjacobsyardcare.com/2024/09/28/essential-lawn-care-tips-for-longmont-residents/