When to Plant Cilantro in Alaska (2026 Guide)

Cilantro is a versatile herb that thrives best when planted in the cool temperatures of spring and fall. For gardeners in Alaska, understanding the local climate and frost dates is crucial for a successful harvest. In Anchorage, the last spring frost typically occurs around May 26, creating a narrow window for planting this culinary staple before the summer heat sets in.

Given that cilantro tends to bolt quickly when faced with warm temperatures and long days, timing becomes essential. By being aware of the average first fall frost date of September 10, Alaska gardeners can plan for a second planting. This allows for a continuous supply of fresh cilantro, making it easier to enjoy its aromatic leaves throughout the growing season.

To maximize yields, it's recommended to practice succession planting by sowing cilantro every 2–3 weeks. This method ensures that even if one batch bolts, another will be ready for harvest. Following this guide will help you enjoy the robust flavors of homegrown cilantro in your favorite dishes while navigating Alaska's unique growing challenges.

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.	Sow seeds outdoors from May 27 – June 15, directly in the ground.	Begin harvesting from June 15 – September 1, using a cut-and-come-again method.

Cilantro Planting Windows in Alaska

Indoor start: Not applicable as indoor starting is not recommended for cilantro in Alaska.
Transplant outdoors: Not applicable as outdoor transplanting is not recommended for cilantro in Alaska.
Harvest: Harvest can be done from June 15 – September 1, making the most of the growing season.

Common Mistakes Growing Cilantro in Alaska

One common mistake is sowing cilantro too early, which can lead to damaging late spring frosts in Alaska. Wait until after the last frost date in your area to ensure young plants are not compromised by unexpected cold weather.
Many Alaska gardeners neglect to practice succession planting. Because cilantro bolts quickly, staggering your sowing every 2–3 weeks is essential to ensure a consistent harvest throughout the growing season, extending well into September.
Failing to give cilantro enough sun can also be problematic. While it thrives in cooler weather, lack of direct sunlight may prevent it from growing strong and flavorful. Alaska's extended daylight in the summer can lead to bolting, so ensure you plant in a spot that gets plenty of light.
Some gardeners in Alaska underestimate the importance of soil quality. Given the varied soil types across the state, ensuring proper drainage and nutrient content is vital for healthy cilantro growth. Sandy loam soils tend to be best for this herb.
Ignoring the impact of temperature swings is another common mistake. With the significant temperature fluctuations that can occur in Alaska's climate, growers should stay vigilant to ensure cilantro doesn't bolt too soon.

Frequently Asked Questions

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

If you're in a colder area, consider waiting even longer after the last frost to sow cilantro, possibly until early June. You might also dig a small row cover to help retain heat and protect young plants from unexpected chills.

Can I still plant cilantro in May?

Yes, you should begin planting your cilantro outdoors in late May, right after the last frost date. Be sure to monitor nighttime temperatures closely and protect your young plants if there are untimely cold snaps.

How do I know if my cilantro is ready to harvest?

Cilantro is ready to harvest when it reaches about 4–5 inches tall, ideally from mid-June onwards. Use scissors to cut the stems at soil level, allowing new growth to emerge quickly for continued harvests.

What should I do if my cilantro bolts?

If your cilantro bolts, do not pull it out immediately. Allow it to flower and go to seed, as the flowers attract beneficial insects, and the seeds will likely germinate come next season, ensuring a crop of cilantro without additional planting.

Can I use cilantro seeds for cooking right away?

While cilantro seeds can be used fresh, they're best allowed to mature and dry on the plant. Once dry, you can grind them for a fresher, more aromatic spice that significantly enhances your culinary creations.