Last reviewed: April 28, 2026

Canola and barley occupy a significant share of seeded cropland across the Canadian prairies. Canola is Canada's most valuable crop export by dollar value, while barley underpins both domestic livestock feeding and a growing malt and craft beverage industry. The two crops sit comfortably in the same rotation alongside wheat and pulse crops, and their production calendars largely overlap on the spring-to-fall cycle that defines prairie farming.

Canola: origins and importance

Canola is a product of Canadian plant breeding. In the early 1970s, researchers at the University of Manitoba and Agriculture Canada developed low-erucic-acid, low-glucosinolate rapeseed varieties under the name "canola" — a portmanteau of "Canada" and "ola" (oil). The name was trademarked and the crop became a dominant feature of the prairie landscape, with bright yellow flowering fields visible across Alberta and Saskatchewan from late June through July.

Canada exports canola oil and meal to more than 50 countries. China, Japan, Mexico, and the United States are the leading destinations for Canadian canola oil, while the protein-rich meal is used in aquaculture feeds, poultry rations, and specialty human food products. The Canola Council of Canada maintains a research and market development mandate that has sustained the crop's global competitiveness over several decades.

Canola seeding and establishment

Canola is one of the earliest crops seeded on the prairies, typically going in from late April to mid-May. The seeds are very small — roughly 200,000 per pound — and require shallow placement at 10 to 15 mm depth into firm, moist soil. Seed-to-soil contact is critical; air-seeder drills calibrated for small seeds and equipped with packing wheels are standard equipment.

Hybrid canola varieties now dominate the market. They offer yield advantages over open-pollinated lines of 10 to 15 percent in most environments and carry stacked herbicide tolerance traits — predominantly glyphosate-tolerant (Roundup Ready) or imidazolinone-tolerant (Clearfield) systems — that simplify in-crop weed management. The use of herbicide-tolerant canola has reshaped weed management across the entire prairie rotation, with implications for resistance management in other crops.

Target plant populations are 5 to 8 plants per square metre. Canola's ability to branch and compensate for thin stands means that uniform emergence matters more than raw plant count. Seeding rate adjustments for expected germination percentage and thousand-seed weight are calculated from variety-specific seed lot data.

Pest and disease management in canola

Flea beetles are the most persistent early-season pest in canola across the prairies. Adults emerge from overwintering sites in late April and May, exactly when canola seedlings are most vulnerable. Seed treatments containing neonicotinoid insecticides — primarily thiamethoxam and imidacloprid — have been the standard commercial response, though their use has faced regulatory scrutiny related to pollinator exposure.

Sclerotinia stem rot is the primary fungal disease in canola. The pathogen (Sclerotinia sclerotiorum) produces airborne ascospores that infect petals during flowering. Once those infected petals land on stems and leaves, the fungus colonises the tissue and forms bleached lesions that can girdle stems and cause premature ripening. Fungicide applications timed to 20 to 30 percent flower are the standard management response in high-risk years. Crop rotations with at least a three-year gap between canola crops reduce sclerotia populations in the soil.

Blackleg (Leptosphaeria maculans) caused serious losses in canola fields in the 1980s and 1990s. Resistant varieties virtually eliminated yield losses from the disease for two decades, but new races of the pathogen have overcome older resistance genes in some regions. Current variety selection requires attention to the resistance rating against local blackleg races, which Agriculture and Agri-Food Canada monitors through annual pathotype surveys.

Canola swathing and straight-cut harvest

Canola harvest timing is determined by seed colour change rather than calendar date. When 60 to 70 percent of seeds on the main stem have turned from green to brown or tan, the crop is ready for either swathing or straight-cut combining. Straight-cut harvest has grown in adoption because it eliminates the labour and equipment cost of swathing, but it requires either natural dry-down or pod-shatter-resistant varieties to prevent losses from the combine header.

Canola seed must be stored below 8 percent moisture to remain safe in the bin. Because the crop is harvested at 10 to 12 percent moisture in wet years, aeration-drying in bins or dryer passes at the elevator are necessary before long-term storage. Canola in bin storage is also susceptible to self-heating if there are green seed or weed contamination issues.

Barley varieties and end-use markets

Barley in Canada is grown for two distinct markets: feed and malt. Feed barley is sold to livestock operations, primarily cattle feedlots in Alberta, and is priced relative to corn and wheat as a feedgrain substitute. Malt barley is contracted directly with maltsters — including large operations supplying major Canadian and international breweries — and commands a premium over feed barley when it achieves the quality specifications required for malting.

Two-row spring barley varieties are the standard for malting. Registered varieties in Canada carry malting approval from the Canadian Grain Commission based on germination energy, protein content, and enzymatic activity parameters that maltsters require. Common registered two-row varieties include CDC Copper, Metcalfe, and AAC Synergy, each with different regional performance profiles across Alberta, Saskatchewan, and Manitoba.

Six-row barley varieties are grown in smaller volumes, mainly in eastern Canada, and are used for feed and some craft malting applications. The higher enzyme content of six-row barley makes it useful in mash bills that include adjunct grains, a feature valued by some craft distillers.

Barley agronomy and production notes

Barley is generally seeded slightly earlier than wheat, as it is more tolerant of cool soil temperatures at germination. It is also more sensitive to late-season heat stress during grain fill than wheat, which is one reason seeding date accuracy matters. Target seeding dates for spring barley in most prairie environments run from late April to May 5.

Barley requires careful nitrogen management. Excess nitrogen delays maturity, increases lodging risk, and raises grain protein above the 12 to 12.5 percent ceiling that maltsters specify. Producers contracting malt barley typically apply conservative nitrogen rates and avoid late-season top-dress applications that could push protein above grade.

Fusarium head blight affects barley as well as wheat, with similar impacts on grade and DON accumulation. Net blotch (Pyrenophora teres) is the most common foliar disease in barley and is managed through seed treatment fungicides, crop rotation, and variety selection. Most registered malting varieties carry some net blotch resistance, but ratings vary and field conditions determine whether in-crop fungicide applications are warranted.

Both canola and barley production data, including variety performance and export statistics, are available through Statistics Canada and the individual commodity organisations that track these sectors.