Plant garlic in Canada in the fall, four to six weeks before the ground freezes hard, which means most of the country should get cloves in the soil between late September and the end of October. Push each clove, pointed end up, a few centimetres deep, space them well apart and cover the bed with a thick layer of straw or leaves before winter.
The timing matters now because the window is open and closing. Garlic needs a stretch of cold weather to form a proper bulb, and Richters says the plant needs six to eight weeks of cold temperatures. Planting in autumn lets the cloves grow roots before the freeze, then rest through winter and sprout in spring. Gardeners in the Prairies and other colder zones are working to the earliest deadlines, while those in southern Ontario and coastal regions have a little longer. The steps below draw on guidance from Richters, Small Farm Canada and the Farmers’ Almanac. Where those sources give different figures, ranges are shown rather than a single number.
Garlic is a low-risk crop for a home gardener. It needs no special equipment, only a sunny bed, some compost and good seed garlic.
- Choose your planting date by region. Richters recommends mid-September to late October for the Prairies and other cold zones (zones 2 to 4), aiming for Oct. 1 to 15. For Ontario, it suggests late September through October in northern areas and into early November in the south. Coastal and eastern regions can plant until late November or even early December, the company says. Small Farm Canada puts the rule at “at least four to six weeks before the ground freezes” and notes that planting in November or December is possible if the soil is not frozen, though yield potential drops.
- Buy the right garlic. Use locally grown seed garlic from a nursery or seed supplier, not supermarket bulbs. The Farmers’ Almanac warns that most grocery-store garlic is treated with sprouting inhibitors and may refuse to sprout. Richters recommends hardneck types for Canada (it names Music and German Mennonite as examples) because they handle cold winters well. Softneck garlic suits warmer climates, the company says.
- Pick a sunny, well-drained spot. Richters says garlic wants at least six to eight hours of full sun. Small Farm Canada says it prefers well-drained soil with a neutral pH. Richters gives a target range of 6.0 to 7.0.
- Prepare the soil. Work the bed loose to a depth of 20 to 25 centimetres (8 to 10 inches) and mix in well-aged compost, Richters advises. The Farmers’ Almanac says adding organic matter before planting increases yield.
- Split the bulbs into cloves just before planting. The Farmers’ Almanac says to separate them on planting day, not earlier, because the cloves dry out quickly.
- Plant each clove pointed end up. The root end goes down. Depth guidance varies by source: the Farmers’ Almanac says about 2 inches (5 cm), Richters says 2 to 3 inches (5 to 7.5 cm) measured from the soil surface to the tip of the clove, and Small Farm Canada says about an inch of soil over the top.
- Space the cloves apart. Richters recommends 4 to 6 inches (10 to 15 cm) between cloves in rows 8 to 12 inches (20 to 30 cm) apart. Small Farm Canada says six inches, and the Farmers’ Almanac says six to eight inches.
- Mulch heavily. Cover the bed with straw, shredded leaves or grass clippings. Richters recommends a layer of 4 to 6 inches (10 to 15 cm), and Small Farm Canada recommends the same depth of straw. The mulch insulates the soil and guards against the freeze-thaw cycles and frost heave that can push cloves out of the ground or cause rot, the latter source says.
- Wait for summer. Hardneck garlic produces edible scapes in early summer, Richters notes.
Small Farm Canada notes that yield potential drops with later planting, so earlier is better. Check your local frost dates, and if you are unsure which varieties suit your zone, ask a local nursery or garden centre.
Sources: Richters, “The Perfect Time for Garlic Planting: Your Complete Fall Guide in Canada”; Small Farm Canada, “Is It Too Late to Plant Garlic?”; Farmers’ Almanac, “How to Grow Garlic: Fall Is the Time to Get Planting.”
