When to Plant Scallions in Alaska (2026 Guide)

If you're considering adding scallions to your Alaska garden, you're in for a treat. Scallions, also known as green onions, are incredibly versatile and can thrive in a variety of conditions. In Alaska's Zone 5a, the average last spring frost date is May 26, giving you a timely opportunity to plant these tasty greens in your garden.

These crops are quick to mature, typically harvesting within 60 to 70 days from seed, making them a fantastic choice for the shorter growing season. With the first fall frost occurring around September 10, you'll want to ensure that you make the most of your season by planting them at the right time.

By sowing scallions every 3 to 4 weeks, you can enjoy a continuous harvest from late spring through early fall. Their ability to tolerate light frosts also means you'll have the flexibility to plant well into the season. Get ready to enjoy fresh scallions from your own garden!

Planting Schedule by USDA Zone in Alaska

Zone	Indoor start	Transplant out	Direct sow	Harvest
Zone 5a	Start February 15 – March 1, ~6–8 weeks before May 26	Transplant outdoors after May 26, when the danger of frost has passed	Direct sow seeds from May 26 – July 1	Harvest from June 15 – September 10

Scallions Planting Windows in Alaska

Indoor start: Start your scallion seeds indoors between February 15 and March 1 to give them a strong start before transplanting.
Transplant outdoors: Transplant your scallion seedlings outdoors after the last frost date of May 26 to ensure healthy growth.
Harvest: You can begin harvesting your scallions as early as June 15, enjoying fresh greens until the first fall frost around September 10.

Common Mistakes Growing Scallions in Alaska

One common mistake in Alaska is planting scallions too late. Given the short growing season, it's crucial to adhere to the May 26 frost date to ensure enough time for a successful crop. Waiting too long risks losing your harvest to the first fall frost on September 10.
Some gardeners in Alaska underestimate the importance of consistent watering. During the warmer months, scallions can suffer from heat stress or dry conditions, affecting their growth. Maintaining moisture is essential for strong yields, especially as summer progresses.
Anchorage and other Alaskan regions can experience fluctuations in daylight that may impact growth. Scallions thrive with at least 6 hours of sunlight, so ensure they’re planted in a location that maximizes their exposure, particularly during the longer days of summer.
Many new gardeners in Alaska plant scallions too sparsely. Scallions grow best when densely sown, taking advantage of tight spaces. This practice not only maximizes space but also allows for continuous harvests, doubling productivity per square foot.
Another mistake is not harvesting scallions promptly. Unlike bulb onions, which can be stored for long periods, scallions have a shorter shelf life. Once they reach a suitable size, they should be harvested to prevent spoilage and ensure the freshest flavor.

Frequently Asked Questions

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

If you're located in a cooler area, consider delaying outdoor planting until conditions improve. Use row covers to protect emerging seedlings from unexpected late frosts and provide additional warmth.

Can I still plant scallions in May?

Yes, you can plant scallions in May! Just be sure to wait until after the last frost on May 26. You can direct sow seeds or transplant seedlings as long as the soil isn't too cold.

How do I know when to harvest scallions?

Harvest scallions when they reach about 6 to 8 inches tall. You can start harvesting baby scallions for green tops as soon as they are big enough to use, typically around June 15.

Can scallions tolerate frost?

Yes, scallions can tolerate light frost, down to about 28°F. If a frost is expected, covering them with row covers can help extend your harvest well into fall.

How can I store scallions after harvesting?

Store freshly harvested scallions in the fridge inside a plastic bag, ideally without washing them until you're ready to use them. For longer storage, consider freezing them in small portions.