When to Plant Cabbage in Whitehorse

Can Cabbage Mature in Whitehorse?

Growing degree days measure how much useful warmth typically accumulates during the season. For cabbage, this helps estimate whether local heat accumulation is usually enough for the crop to reach maturity on time.

From the usual planting window, Whitehorse typically provides about 1509 growing degree days for cabbage. With a typical crop target of 1000, that leaves a heat margin of +509. That heat margin usually gives the crop a dependable buffer, so gardeners have some flexibility in planting date and variety choice without pushing the crop close to the edge.

When Is It Too Late to Plant?

If planting later than usual, this table shows how much growing degree day heat is still available from each point in the season. It is most useful for judging how much flexibility you still have before the crop starts losing margin.

How Different Cabbage Varieties Affect Results

The season in Whitehorse usually supports most cabbage varieties comfortably, which means the more useful decision is what kind of crop you want rather than simply how fast it finishes.

Varieties that often fit well here include:

• Golden Acre — a classic early cabbage with strong practical fit in shorter seasons
• Early Jersey Wakefield — an early pointed cabbage that is useful when speed and spring harvests matter more than storage
• Stonehead — reliable and approachable, especially where gardeners want a firm early head
• Red Express — a faster red cabbage option for gardeners who want color without moving all the way into long-season storage types
• Cheers — productive and strong where the season offers a comfortable cool run
• Storage No. 4 — better suited where the growing window gives longer room for finishing

Main risk: When this crop underperforms in Whitehorse, the culprit is usually timing or variety choice rather than the climate itself.

How Frost Affects Planting Dates for Cabbage in Whitehorse

Whitehorse usually has about 86 frost-free days, with a typical last spring frost around June 3 and a typical first fall frost around August 28.

Cabbage is generally somewhat frost tolerant and temperatures below about 28°F ( -2 °C) can slow growth or damage plants.

Cabbage is usually tolerant enough of cool conditions that light frost is not the main concern. The more useful question is how early planting affects establishment and overall crop quality.

When this crop underperforms in Whitehorse, the culprit is usually timing or variety choice rather than the climate itself.

In Whitehorse, the local season usually gives cabbage plenty of breathing room when planting happens around May 13. For a better local margin, gardeners usually do best in south-facing walls, sheltered gardens, raised beds, and sunnier urban lots. Cooler spots like low spots, exposed sites, and shadier yards often make timing tighter. For cabbage, the best local sites often help the crop get moving earlier and make timing a little more forgiving.