Lawn Fertilizer

Shop lawn fertilizer suited to BC's Interior climate — available in 25 kg bags for homeowners, acreages, and hobby farms. Whether you're feeding an established lawn or getting a new one started, we carry granular and slow-release options that work with BC's soil and growing season. In store in Kamloops and Merritt, or order online for delivery across BC.

We Carry The Top Lawn & Garden Supplies

Which Fertilizer Should You Choose?

Not sure which fertilizer is right for your lawn or garden? Here’s a quick guide to help you choose based on your goals.

For Easy, Low-Maintenance Lawns	Go with slow-release fertilizers like 25-5-15 or controlled-release 18-18-18. They feed gradually, require fewer applications, and reduce the risk of burn.
For Quick Green-Up	Choose a fast-acting fertilizer like 46-0-0 urea or standard 18-18-18. Ideal when your lawn needs an immediate boost in colour.
For New Lawns or Seeding	Use a starter fertilizer like 14-16-11-12S. Higher phosphorus supports strong root development and early growth.
For Gardens & All-Purpose Use	A balanced fertilizer like 18-18-18 works across lawns, vegetables, flowers, and trees — great if you want one product for everything.
For Pastures & Acreage	Use high-nitrogen or balanced blends depending on your soil needs — urea (46-0-0) for nitrogen, or 18-18-18 for full nutrition.

Still not sure?
Start with your goal — greener lawn, new growth, or full-season feeding — and choose the fertilizer that matches. Or reach out and we’ll help you dial it in.

Lawn Fertilizer for a Healthy BC Lawn

The right fertilizer program supports your lawn through every stage of the growing season. Here's how proper nutrition contributes to overall lawn health:

Green colour and growth — nitrogen drives leafy growth and gives your lawn that deep green colour. A well-timed spring application makes the biggest visual difference of the year.
Root strength — phosphorus supports deep root development, which improves drought tolerance and helps your lawn bounce back faster after stress.
Summer resilience — potassium builds resistance to heat, disease, and drought — all real pressures for lawns in Kamloops and Merritt during July and August.
Winter hardiness — a fall application high in potassium strengthens grass plants before dormancy, leading to a faster, healthier green-up the following spring.
Weed suppression — a thick, well-fed lawn naturally crowds out weeds by leaving less bare soil for them to establish in. Consistent fertilization is one of the most effective long-term weed prevention strategies.

BC Lawn Fertilization Basics

Fertilizer works best as part of a consistent seasonal program — not as a one-off fix. A few principles worth keeping in mind:

Timing matters more than frequency — fertilizing at the right time of year delivers far better results than applying more often. In the Interior, late April to early May for spring and mid-September for fall are your two most important windows.
The NPK numbers tell you everything — the three numbers on every bag represent nitrogen, phosphorus, and potassium. Match the numbers to the season: higher nitrogen in spring, higher potassium in fall.
Always water it in — granular fertilizer needs to be watered in within 24–48 hours of application. In BC's dry Interior, don't count on rain — be ready to water it yourself.
Don't over-apply — more fertilizer doesn't mean better results. Over-application causes burn, promotes weak growth, and can damage your soil over time. Follow the bag's recommended rates.

Not sure which fertilizer fits your lawn or schedule? Our team in Kamloops and Merritt has been helping BC Interior homeowners with exactly these questions since 1947.

Frequently Asked Questions

When should I fertilize my lawn in BC?

Timing depends on your elevation and local climate, but for most BC Interior lawns the key windows are late April to early May for spring, and mid-September to early October for fall. Wait until soil temperatures are consistently at 10°C before applying — grass can't absorb nutrients efficiently in cold soil.

What NPK numbers should I use for a lawn in spring?

Look for a fertilizer with a high first number (nitrogen) in the range of 20–30, a moderate middle number (phosphorus) around 3–10, and a solid potassium number (third) around 10–15. A 25-5-15 blend is a reliable starting point for most cool-season BC lawns in spring.

How often should I fertilize my lawn?

Three times per year is enough for most lawns — spring, a light application in early summer if needed, and fall. Fertilizing more frequently tends to cause more problems than it solves, including burn risk and excessive thatch.

Is lawn fertilizer safe for pets?

Most granular fertilizers are safe for pets once they've been watered in and the lawn has fully dried — usually 24–48 hours after application. Keep animals off treated areas until then. If you'd prefer extra peace of mind, look for organic or pet-labelled options.

What's the difference between slow-release and quick-release fertilizer?

Quick-release fertilizers act fast but require careful application — they can burn your lawn if over-applied or not watered in promptly. Slow-release formulas feed your lawn gradually over several weeks with less burn risk and more consistent results. For most homeowners, slow-release is the safer, lower-maintenance choice.

Rewards In Store | Nearby Locations

Purity Feed Kamloops

Phone: (250) 372-2233
471 Okanagan Way, Kamloops, BC V2H 1G7
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Purity Feed Merrit

Phone: (250) 378-4432
1690 Voght St, Merritt, BC V1K 1C8
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