Gardening in Yukon

Everything we have worked out for Yukon: 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 Whitehorse, the last spring freeze falls around June 5 and the first fall freeze falls around August 25, 600 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 Yukon: 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.

What Eats Potato in Yukon, and When

A yellow and black striped Yukon potato beetle rests on a textured green potato plant leaf in bright sunlight.

Four of the five pests documented for this area feed on potato: aphids, cutworms, root maggots and slugs. The fifth, spruce beetle, belongs to the forest.

When to Overseed a Lawn in Yukon

Weeds sprouting along a concrete edge in a lawn area during warm season.

The short answer: aim to finish sowing by mid-July, not late summer. Yukon’s cool-season lawns need roughly 45 days of growing weather to root before the…

First and Last Frost Dates in Yukon

First and Last Frost Dates in Yukon

Whitehorse’s climate normals put Yukon’s average last frost on June 5 and first fall frost on August 25, an eleven-week season gardeners should treat as a guideline, not a guarantee.