Do you use fertilizers from Home Depot or Canadian Tire?

No. We use custom-blended, professional-grade fertilizers not available at retail stores — the same quality applied to golf courses. These include slow-release coatings and micro-nutrients that box store products simply don't contain.

Get a Free Quote (403) 324-5296

Lawn Fertilizer Services Calgary

Professional Lawn Fertilizer Services for a Lush, Green Calgary Lawn

Calgary's family-owned lawn care specialists, committed to excellence since 2011. Golf course-quality fertilizers, season-matched applications, and a team that cleans up after every visit.

Get My Price (403) 324-5296

Family owned since 2011

Golf course-quality fertilizers

Guaranteed results

No auto-renew contracts

Lush green Calgary lawn after professional Cougarstone fertilizer treatment

2026 pre-season sale on now!

Calgary Fertilizer Packages

Explore our range of Lawn Care Calgary packages tailored for your green space. From basic upkeep to complete lawn transformations, we have the perfect plan for every yard. Ensure your lawn is lush, healthy, and green throughout the seasons with our expert care.

Unlimited Weed Control
Early-Season Fertilizer
Mid-Season Fertilizer
Late-Season Fertilizer
Winterizing Fertilizer
Liquid Aeration
Soil Enhancer
Soil Flusher

Unlimited Weed Control
Early-Season Fertilizer
Mid-Season Fertilizer
Late-Season Fertilizer
Winterizing Fertilizer
Liquid Aeration
Soil Enhancer
Soil Flusher
Chinch Bug Control
Sod Webworm Control

Prices are per year, and lawns are up to 2500 square feet. Larger lawns will have additional charges. GST not included.

How We Fertilize Your Lawn

Your Calgary Lawn, Fed the Right Way All Season

Every package includes a full season fertilizer program — up to four applications timed to what your lawn needs. The formula changes each visit because your lawn's needs change too.

Spring
Early-Season Fertilizer Application

High-nitrogen formula wakes your lawn out of winter dormancy, greens it up quickly, and helps it spread and thicken heading into the growing season. This is the most critical application of the year — the foundation everything else builds on.

Included in every Cougarstone package
Early Summer
Mid-Season Power Application

Balanced nitrogen with elevated potassium strengthens your turf ahead of summer heat and drought stress. Iron content is added at this stage for that rich, dark-green colour Calgary homeowners notice immediately. Extra micro-nutrients help manage heat stress through July and August.

Included in every Cougarstone package
Late Summer
Late-Season Fertilizer Application

High potassium helps your lawn recover from a stressful summer and grow the deep, strong root systems it needs to survive winter. Iron content keeps colour rich deep into fall. This application prepares the lawn structurally before temperatures drop.

Included in every Cougarstone package
Fall
Winterizing Application

A liquid application combined with liquid aeration. Nutrients are delivered directly to root systems as the lawn enters dormancy, giving it reserves to draw on through winter. This is the application that sets up your spring green-up — lawns that receive it consistently come back noticeably faster.

Included in Lynx, Cougar & Rocky Mountain packages

Seasonal Timing

When We Apply Fertilizer in Calgary

Calgary's growing season runs roughly May through October. Timing matters — applying at the wrong time reduces effectiveness and can stress your lawn.

SpringEarly Season

High nitrogen. Green-up and growth stimulation.

SummerMid Season

Potassium + iron. Heat tolerance and deep colour.

FallLate Season

Root building + winterizing. Recovery and dormancy prep.

WinterDormant Season

No applications. Lawn draws on fall nutrients through dormancy.

Professional Grade Products

Not All Fertilizers Are the Same — Ours Are Better

The fertilizer bags at Home Depot and Canadian Tire are designed to be cheap, not effective. Cougarstone uses custom-blended, professional-grade fertilizers — the same quality applied to golf courses — with formulations matched to what Calgary lawns actually need each season.

Golf Course Quality

Custom blended to professional turf standards — not the generic, one-size-fits-all products found at box stores.

Specially Coated for Slow Release

Each granule is coated for gradual, sustained nutrient release over weeks. No growth spurts, no burning — steady progress all season.

Micro-Nutrients Included

Our blends contain micro-nutrients completely absent from box store brands — giving your lawn everything it needs to truly thrive.

Season-Matched Formulas

Spring, summer, and fall each have different lawn needs. We adjust N-P-K ratios every application — not the same bag all year.

Feature	Box Store Brands	Cougarstone Fertilizers
Slow-release coating	Rarely or partial	Always — every bag
Micro-nutrients	Not included	Included in every blend
Season-specific formula	Generic year-round	Adjusted each application
Risk of burning lawn	Higher — fast release	Minimized — gradual release
Iron for deep green colour	Typically absent	Included mid and late season

Why It Matters

Why Slow-Release Fertilizer Is Better for Your Lawn

Our fertilizers are specially coated so nutrients release gradually over weeks — not all at once. This is the fundamental difference between professional-grade products and hardware store alternatives.

Cougarstone technician applying professional fertilizer to a Calgary residential lawn

Nutrient release over time

Slow-release (Cougarstone) — gradual and sustained

Weeks of consistent feeding — even growth, no burn risk

Fast-release (box store) — spike then drop

Short burst then nothing — growth spurts, potential burn

Slow-release coating also minimizes nutrient runoff into storm drains — better for your lawn, better for the neighbourhood.

We Clean Up After Every Visit

Our highly trained technicians take pride in leaving your property cleaner than they found it. Fertilizer granules on driveways and sidewalks stain concrete permanently — so every visit ends with a full cleanup of all hard surfaces, including neighbouring driveways if granules have drifted.

Your driveway and sidewalks blown clean after every application
Neighbouring hard surfaces cleared if granules have drifted
Professionally trained technicians — spills don't happen, and any stray granules are spread immediately
Service card left at your door after every visit — detailing what was applied and any relevant care instructions
Safe for children and pets

Fertilizer left on concrete stains permanently. This is a step many companies skip. We never do.

Understanding Fertilizer

What Those Three Numbers on the Bag Actually Mean

Every fertilizer bag shows three numbers. These represent the percentage of Nitrogen, Phosphorus, and Potassium — and adjusting them is how we give your lawn exactly what it needs at each point in the season.

25 — 3 — 15

This label means the bag is 25% Nitrogen, 3% Phosphorus, 15% Potassium. Applied at 4 lbs per 1,000 sq ft, that delivers exactly 1 pound of nitrogen to your lawn. This kind of precision is only possible with professional products — not box store bags with unknown slow-release ratios.

A quality slow-release bag also shows what percentage of nitrogen is coated. A rating of 65% slow-release means 65% releases gradually over weeks, and 35% is quick-release for immediate green-up. We choose blends that maximize the slow-release portion for steady, even results.

Nitrogen The "Up" Nutrient — upward growth

Drives the lush green colour and leaf growth. Most critical in early spring coming out of dormancy. We run high nitrogen in the first application of every season.

Phosphorus The "Down" Nutrient — root development

Supports root growth and energy transfer below ground. Important for new or overseeded lawns. Established lawns need modest levels — our blends keep it balanced, not excessive.

Potassium The "All-Around" Nutrient — resilience

Improves disease resistance, heat tolerance, and drought recovery. We increase potassium through summer and fall — exactly when Calgary lawns face their greatest stress heading into winter.

Common Questions

Lawn Fertilization — Frequently Asked Questions

Questions we hear every season from Calgary homeowners.

Yes — professional lawn fertilization delivers meaningfully better results than DIY for most Calgary homeowners. The primary reason is product quality: professional-grade, slow-release fertilizers with micro-nutrients are not available at retail. Combined with correct seasonal timing and precise application rates, the difference in lawn quality is visible. The cost of a professional program is also typically less than repeated DIY purchases once you factor in equipment, products, and time.

The most important application is the early spring fertilization — typically May once soil temperatures have risen. This high-nitrogen application wakes the lawn out of winter dormancy and sets up the entire growing season. A second application follows in early summer, and a third in late summer. A fall winterizing application in September–October is also highly beneficial for preparing roots for dormancy.

Both matter — the best results come from doing both. Spring fertilization drives the green-up and growth that establishes your lawn for the season. Fall fertilization prepares root systems for dormancy and gives the lawn reserves to draw on through winter. Lawns that receive a fall application consistently green up faster and more evenly the following spring.

October is the tail end of the window for a winterizing application in Calgary. We aim to complete fall fertilization by mid-October at the latest — before the ground freezes. Earlier in fall is better, as the lawn can still absorb and use nutrients before entering full dormancy. If it's late October and the ground is already cold, it's better to wait until spring.

Yes — over-fertilizing is a real risk, particularly with fast-release products. Too much nitrogen at once causes rapid, weak growth and can burn your lawn. This is one of the main reasons professional slow-release fertilizers are preferable: the gradual release rate makes it much harder to over-apply. Proper calibration of spreader settings and application rates is critical — we follow precise protocols for every visit.

Granular fertilizer should be applied to dry grass and then watered in afterward. Applying to wet grass can cause granules to clump and stick to blades, leading to uneven distribution and potential burning where they concentrate. After application, watering activates the slow-release coating and begins moving nutrients into the soil.

Ideally, fertilize when rain is forecast within 1–2 days. This allows application to dry grass while rain provides the watering-in needed to activate the granules. A heavy rainstorm immediately after application can cause runoff, so we avoid applications when heavy rain is forecast within a few hours.

Never. After every application, we blow all hard surfaces — your driveway, sidewalks, and neighbouring surfaces if needed — completely clear of granules. Fertilizer left on concrete stains permanently. We also leave a service card at your door after every visit detailing what was applied and any relevant care instructions.

Every package includes 3 fertilizer applications throughout the season — early spring, early summer, and late summer. The Lynx, Cougar, and Rocky Mountain packages also include a fall winterizing application. Each visit uses a different formula matched to what your lawn needs at that point in the season.

Ready for a Lawn That Looks Great All Season Long?

Professional fertilization with golf course-quality products, seasonal applications timed to Calgary's climate, and a team that cleans up after every visit. No box-store shortcuts. No surprises.

Get My Price (403) 324-5296

Family owned since 2011

Guaranteed results

No auto-renew contracts

Serving Calgary since 2011

What Calgary Homeowners Say

Trusted by Families Across Calgary

5.0 · Google Reviews

"I've worked with Mike for the last 10 years and I always find him and his team very professional. Cougarstone Lawn Care is always responsive and care for my lawn as if it is their own. I also would like to thank Jake for his weed control and fertilizer service this season. We barely had any weeds in our backyard this year, just like the previous years."

Hakan Haskoylu

Google Review

"Mike and the gang restored my decrepit, weed infested lawn to the lush envy of my neighbours. They were timely in delivering the fertilizer and weed management and we will continue to use them next year for sure."

Marc Leckman

"Cougarstone Lawn Care has done our weed care and fertilizer for five or six years now — and the lawn has looked great! Appreciate their professionalism."

J H