When to Plant Garlic in Alberta: Counting Back From the First Frost
Alberta’s garlic planting window runs from mid to late August, timed against Calgary’s mean first fall frost, with adjustments for colder districts.
Gardening in Alberta
Everything we have worked out for Alberta: what to plant and when, which varieties finish in time, the pests that actually turn up here, and the jobs that pay off month by month. We also cover the rest of the property, from lawns and soil to home care and energy, because a garden rarely stops at the vegetable bed.
The numbers first, because everything else follows from them. Measured at the weather station in Calgary, the last spring freeze falls around May 21 and the first fall freeze falls around September 16, 1,171 growing degree days in the year.
That is little accumulated warmth: tomatoes need a tunnel or a greenhouse here, whatever the frost dates suggest. Garlic does well: 39.1 weeks below 40 °F, comfortably past the six it needs to form a proper head.
Elsewhere on the property in Alberta: the pests that turn up here.
Figures from Environment and Climate Change Canada. A state is not one climate: elevation, a large lake or the coast can move these dates by two weeks either way, so check your own county with the extension service before you spend money.
Growing Garlic in Alberta: Planting Dates, Varieties and Winter Cold
Alberta’s cold winters exceed garlic’s chilling requirement, so success depends on planting cloves ahead of the first fall frost and choosing hardneck varieties suited to hard winters.
Growing Tomatoes in Alberta: Planting Dates, Varieties and Ripening Before Frost
Alberta’s short, frost-bounded season means picking fast-maturing tomato varieties and timing transplant carefully around Calgary’s average frost dates.
Tomato Varieties That Ripen in Time in Alberta
Alberta’s frost-free season averages about 118 days at Calgary, so tomato variety choice for this state comes down to matching days-to-maturity to that window.
Tomato Planting Dates in Alberta: Counting Back From Your Frost Window
Alberta’s tomato planting dates depend on Calgary’s mean frost normals, which mark the midpoint of a range rather than a safe cutoff for transplanting outdoors.