When to Plant Chives in Colorado (2026 Guide)

Chives are not only one of the most rewarding herbs to grow, but they also come with a low-maintenance profile that appeals to both novice and experienced gardeners. Known for their mild onion flavor, these perennial herbs can thrive in Colorado's diverse climate, making them a staple for any herb garden. With the right timing, you can enjoy chives from early spring all the way through late fall.

In Colorado, the best planting times for chives will depend on your specific USDA Hardiness Zone. For instance, if you live in Zone 5b, the median last spring frost date is May 5, while gardeners in Zone 5a can expect this date to be May 17. Understanding these frost dates can help ensure a successful and bountiful chive harvest all season long.

Whether you're located in the bustling city of Denver, the scenic views of Boulder, or the beautiful landscapes of Colorado Springs, knowing when to plant chives is crucial. This guide will give you valuable insights into planting and caring for chives in the unique climate of Colorado, so you can enjoy their delicate flavor in your meals and share stunning blooms with your family and friends.

Planting Schedule by USDA Zone in Colorado

Zone	Indoor start	Transplant out	Direct sow	Harvest
Zone 5b	Start March 1 – March 15, ~6–8 weeks before May 5	Transplant outdoors after May 5	Direct sow after May 5	Harvest from June to late October
Zone 5a	Start March 15 – March 30, ~6–8 weeks before May 17	Transplant outdoors after May 17	Direct sow after May 17	Harvest from June to mid-October
Zone 6a	Start April 10 – April 25, ~6–8 weeks before April 25	Transplant outdoors after April 25	Direct sow after April 25	Harvest from May to late October

Chives Planting Windows in Colorado

Indoor start: For most Colorado gardeners, chives can be started indoors from early March through late April, depending on the zone.
Transplant outdoors: Transplant chives outdoors in Colorado between early May to late April depending on your zone's last frost date.
Harvest: Chives can generally be harvested in Colorado from June until late October, allowing for a lengthy growing season.

Common Mistakes Growing Chives in Colorado

One common mistake gardeners make in Colorado is miscalculating the last frost date. In areas like Colorado Springs and Denver, being aware that the last frost date can vary by a couple of weeks depending on elevation is essential for healthy plants.
Planting chives too late in the season is another frequent error in Colorado. Since chives require a good amount of time to establish before the first fall frost, understanding your local climate is vital to ensuring a successful harvest.
Overwatering is an issue that can plague chive growers in Colorado. Given the variable weather patterns, it's important to check soil moisture regularly, especially during hot spells, to avoid root rot.
Failing to give chives enough sunlight can stunt their growth. In both Denver and Boulder, where winters can be harsh, ensure your chives get full sun exposure during their growing season for optimal health.
Many gardeners in Colorado do not realize that chives can self-seed. If left unchecked, chives can spread rapidly in the garden. Regularly trimming back flowers can help prevent them from taking over your garden beds.

Frequently Asked Questions

What should I do if I missed the May frost dates?

If you miss the last frost date in May, it's best to wait until temperatures consistently stay warm. You can also consider starting chives indoors for an earlier harvest the next year.

Can I plant chives in containers?

Yes, chives do well in containers. Ensure you use a pot that's at least 10 to 12 inches wide for mature clumps. Regularly check for overcrowding and divide them every couple of years.

Can I still plant chives in May?

Absolutely! As long as you do it after the last frost date for your zone, you can still successfully plant chives in May. Just be prepared for a slightly shorter growing season.

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

If you're in a colder microclimate, consider starting chives indoors earlier than the general dates or using cold frames to protect them when planted outside. Doing so can give you a better chance of a successful harvest.

How often should I water my chives?

Chives prefer consistently moist soil but avoid waterlogging. Water them once a week, or more frequently during hot spells. Always check the soil moisture before watering to ensure healthy growth.