Ortho Killex Herbicide — Canada-Wide Commercial Supply

Agricultural · Golf courses · Sod farms · Excepted commercial uses · Health Canada Reg. #16945

✓ Free shipping on orders $199+ ✓ Authorised Ortho® reseller ✓ Volume discounts applied at checkout ✓ Ships to all provinces
?? Canadian supplier ? Same-week dispatch ? Health Canada Reg. #16945 ? Complies with provincial regulations
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Volume discounts applied automatically at checkout — no code needed Buy 4–11 units: 5% off per unit  ·  Buy 12+: 10% off per unit
Ortho Killex 1L Lawn Weed Control Concentrate

Ortho Killex 1L Concentrate — 8,000 sq. ft.

Killex 1L concentrate covers 8,000 sq. ft. at the standard application rate — enough for about three-quarters of a Canadian football field per litre. Mix at 15 mL per litre of water for a broadcast sprayer, or adjust down for spot treatment. The concentrate format is the practical choice for sod farms, golf courses, and agricultural operations where you're covering real ground.

For commercial & excepted use · Health Canada Reg. #16945

$69.99 / unit
QtyPer unit
1–3$69.99
4–11$66.49–5%
12+$62.99–10%
Ortho Killex 4L Ready-to-Use with Comfort Wand

Ortho Killex 4L Ready-to-Use — Comfort Wand

Pre-mixed and ready to spray — no measuring, no dilution. The integrated comfort wand extends your reach along fairway edges, fence lines, and crop margins without bending. The 4 L volume means fewer refills on a working walk-through. For operations where setup time matters as much as coverage, this is the format that keeps moving.

For commercial & excepted use · Health Canada Reg. #16945

$79.99 / unit
QtyPer unit
1–3$79.99
4–11$75.99–5%
12+$71.99–10%
Ortho Killex 709mL Ready-to-Use

Ortho Killex 709 mL Ready-to-Use

When you need to take out a specific patch without touching surrounding plants, the 709 mL bottle gives you the control the larger formats don't. Good for walkway cracks, isolated weed clusters, and precision touch-up after a broadcast application misses a spot. Costs less per unit — stock a few for the crew to carry.

For commercial & excepted use · Health Canada Reg. #16945

$24.99 / unit
QtyPer unit
1–3$24.99
4–11$23.74–5%
12+$22.49–10%
Professional applications

Who Uses Killex Professionally in Canada?

⛳ Golf Courses

Killex controls the broadleaf weeds that compromise fairway and rough presentation — dandelions, plantain, and clover — without affecting turf grass. The 1 L concentrate suits boom sprayers covering fairways, and the 4 L RTU handles targeted treatment around greens and cart paths. Apply during active weed growth in late May through August for season-long results.

golf course turf herbicide

? Agricultural Operations

For pasture management, crop margins, and field borders where broadleaf weeds compete with forage grass, Killex is a Health Canada–registered option available for agricultural use across Canada. The concentrate format scales to the acreage you're treating — 1 L covers 8,000 sq. ft. at standard rate, making it straightforward to calculate what you need before ordering.

agricultural herbicide canada

? Sod Farms

Clean, weed-free turf is a production standard, and Killex is a registered tool for maintaining it. The selective formula takes out broadleaf weeds without affecting the grass you're growing. Order in volume — bulk pricing applies automatically at checkout, and the per-litre cost drops as quantity increases.

sod farm weed control canada

? Municipal Parks & Amenity Turf

For parks departments, sports fields, and roadside amenity grass where broadleaf weeds affect presentation and maintenance, Killex provides a registered control option. Confirm that your municipality's bylaws permit the application — some have local restrictions beyond provincial rules. The 4 L RTU is efficient for small-crew spot treatment; the 1 L concentrate suits larger area treatment.

commercial broadleaf herbicide canada
Application guide

How to Apply Killex Concentrate — Coverage Rates and Dilution Guide

Dilution ratio

Mix 15 mL of Killex concentrate per litre of water for standard broadcast application. For spot treatment of individual weeds, reduce to 8–10 mL per litre. Always add the concentrate to water, not the other way around.

Coverage per litre

At the standard 15 mL/L rate, 1 L of concentrate covers approximately 8,000 sq. ft. (about 743 m²). For 1 acre (43,560 sq. ft.), you'll need roughly 5.5 L of concentrate.

Best application conditions

Apply when temperatures are between 15°C and 25°C and no rain is forecast for 24 hours. Killex is rainfast within 1 hour of application. Avoid applying in wind above 15 km/h to prevent drift onto desirable plants.

Seasonal timing in Canada

Target late May through early September when weeds are actively growing. Applications during dormancy or drought stress are less effective. A second application 4–6 weeks after the first handles weeds that weren't fully controlled on the first pass.

Equipment

A pump sprayer, backpack sprayer, or ATV boom sprayer all work well with Killex concentrate. Calibrate your sprayer to ensure consistent coverage. Rinse equipment with water after use — Killex residue will damage broadleaf ornamentals if the sprayer is used for other applications without cleaning.

Coverage math example

A 10-acre sod operation needs approximately 55 L of concentrate per treatment (10 acres × 43,560 sq ft ÷ 8,000 sq ft per litre). At that volume, bulk pricing at checkout reduces the per-litre cost. Check the product page for current price breaks.

Frequently asked questions

Frequently Asked Questions About Killex in Canada

Is Killex legal in Canada?
Yes. Killex is registered with Health Canada (Reg. No. 16945) and is legal to purchase and use across Canada. In Ontario, its use is restricted to excepted commercial applications under Ontario Regulation 63/09 — including agricultural operations, golf courses, and sod farms. In all other provinces, it is available without those restrictions.
Can I buy Killex in Ontario?
Yes, you can purchase Killex in Ontario and have it shipped there. However, Ontario's Cosmetic Pesticides Ban Act restricts its use on lawns and other non-agricultural land for cosmetic purposes. If your operation qualifies as an excepted use under Ontario Regulation 63/09 — agricultural, golf, sod, or similar — you are permitted to apply it. Confirm your use qualifies before purchasing.
What weeds does Killex kill?
Killex is a selective broadleaf herbicide that controls over 50 common broadleaf weed species, including dandelions, clover, plantain, chickweed, and ground ivy. It does not kill grass. It works by being absorbed through the leaves and moving through the plant's vascular system, killing the root as well as the top growth.
How long does Killex take to work?
You'll see wilting and curling within 24–48 hours of application under good conditions. Full kill takes 1–3 weeks depending on weed species, plant size, and weather. Apply when weeds are actively growing and temperatures are between 15°C and 25°C for best results.
Is Killex safe for pets after it dries?
Once the treated area is dry — typically 1–2 hours after application under normal conditions — Killex is generally considered safe for pets to re-enter. Keep dogs and cats off treated areas until the spray has dried completely. As with any pesticide, read the full label for specific re-entry and handling instructions before use.
What's the difference between Killex and Weed B Gon?
Both are selective broadleaf herbicides, but Killex (2,4-D + MCPP + dicamba) and Weed B Gon have different active ingredient combinations, which affects which weed species each controls most effectively. Killex is generally considered stronger for stubborn broadleaf weeds like clover and ground ivy. Availability also differs by province due to Ontario's cosmetic pesticide restrictions.
Can I use Killex near trees and flower beds?
Use caution within the drip line of trees and shrubs — the dicamba component can be absorbed through roots and may cause damage to woody plants. Keep the spray away from flower beds, vegetable gardens, and desirable broadleaf plants entirely. Apply on a calm day to prevent drift, and use a spray shield near valued plantings.
Does Killex kill clover and dandelions?
Yes — both dandelions and clover are listed on the Killex label as controlled species. Dandelions typically show wilting within 48 hours. Clover may require a repeat application if growth is dense. Apply when plants are actively growing for the most consistent results.
Can I use Killex in BC, Alberta, and Quebec?
Yes. Outside Ontario, Killex can be used on lawns and turf without the commercial-use restrictions that apply in Ontario. British Columbia, Alberta, Quebec, and all other provinces allow residential and commercial Killex use in accordance with the Health Canada label. Always check your local municipality — some have their own bylaws that are stricter than provincial rules.
How much Killex do I need for 1 acre?
At the standard application rate, 1 L of Killex concentrate covers approximately 8,000 sq. ft. One acre is 43,560 sq. ft., so you'll need roughly 5.5 L of concentrate per acre. For a 10-acre operation, that's about 55 L. Volume pricing applies automatically at checkout — buying in quantity reduces your per-litre cost.
Regulatory notice: Killex is registered under Health Canada (Reg. No. 16945) and is available for use in excepted commercial applications under Ontario Regulation 63/09, and without restriction in all other Canadian provinces. Permitted excepted uses include agricultural operations, golf courses, sod farms, and other professional turf and land management contexts. It is the purchaser's responsibility to confirm permitted use under all applicable provincial and municipal regulations before application. Read the complete product label before use.