When to Plant Turnip in Alaska (2026 Guide)

Growing turnips in Alaska can be a rewarding experience, especially given the vegetable's cold-hardiness and fast growth. With Anchorage falling under USDA Zone 5a, the gardening season is relatively short, spanning approximately 107 days between frost dates. The median last spring frost occurs on May 26, while the first fall frost typically arrives by September 10.

As you prepare to plant turnips, it’s important to remember their tolerance to cold weather. In fact, turnips often improve in flavor after frost, making the late summer and early fall months an ideal time for harvest. Since turnips can thrive in these cooler conditions, planning will help optimize your yield.

Turnips are usually direct sown in the garden, as transplanting can disrupt their taproot systems. By following the recommended sowing times and harvest guidelines specific to Alaska’s climate, you can cultivate a productive turnip crop that will add variety to your meals. It's beneficial to thin seedlings and focus on their care throughout the growing season.

Planting Schedule by USDA Zone in Alaska

Zone	Indoor start	Transplant out	Direct sow	Harvest
Zone 5a	Not recommended — direct sow only	Not recommended — direct sow only	Direct sow from May 26 – June 10 for the best results	Harvest from September 10 – October 15

Turnip Planting Windows in Alaska

Indoor start: Not applicable, as turnips should not be started indoors in Alaska due to their taproot nature and direct sowing preference.
Transplant outdoors: Not applicable, since turnips are direct sown and not transplanted outdoors in Alaska.
Harvest: In Alaska, turnips should be harvested from September 10 to October 15 for the best flavor and texture.

Common Mistakes Growing Turnip in Alaska

One common mistake when growing turnips in Alaska is failing to thin seedlings adequately. If you plant seeds too closely together, the turnips will struggle for space and nutrients, which can result in small, misshapen roots. Properly spacing seedlings allows for robust growth and better flavor.
Many novice gardeners in Alaska overlook the impact of late spring snowfall on their crops. This rainfall can delay sowing times and lead to uneven germination. It's crucial to monitor weather conditions and ensure soil warmth before sowing to achieve a successful crop.
Alaska gardeners might mistakenly assume they can start turnips indoors to get a jump on the season. However, turnips are best direct sown to avoid disturbances to their taproots, which can lead to poor development. Carefully adhere to the recommended growing techniques.
Another frequent error involves ignoring the best months for harvesting turnips. Waiting too long, especially after September 10, can result in tougher roots. Plan your harvest according to the frost dates to enjoy the best flavor and texture of this vegetable.
Finally, some gardeners may not give appropriate attention to the soil quality when growing turnips. Alaska's soil can vary significantly, and using amendments like compost can enhance its health. Healthy soil promotes robust growth and ultimately leads to a more successful turnip crop.

Frequently Asked Questions

What if I'm in a cold pocket of Alaska?

If you're in a colder area, be aware that frost may last later into the spring. It's crucial to monitor conditions closely and possibly delay sowing until local conditions allow for better soil warmth.

Can I still plant turnip in May?

Yes, you can begin direct sowing turnips just after the last frost date, which is May 26 in Anchorage. You'll have a good window until around June 10 to ensure proper growth.

Should I cover my seedlings at night?

During early growth in May and early June, consider covering your seedlings with frost cloth or row covers. This can provide extra warmth and protection against unexpected late frosts.

How can I tell when my turnips are ready to harvest?

Turnips are typically ready to harvest when their roots reach about 2 to 3 inches in diameter. The best time to do this in Alaska is after the first frost date, around September 10.

Can I grow turnips in containers?

Yes, you can grow turnips in containers! Just ensure they are deep enough to accommodate the roots and provide adequate drainage. Choose a variety suited for smaller spaces.