One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Omaha should be read to figure out when it's the best time to plant achillea.

Planting Calendar for Achillea

Frost tolerance for achillea:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since achillea are very cold tolerant you can plant them much earlier in the year than other plants that might not handle the cold.

The earliest that you can plant achillea in Omaha is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant achillea and expect a good harvest is probably September. If you wait any later than that and your achillea may not have a chance to really do well. You can get started a couple of weeks earlier by starting your achillea indoors.

Last Frost Date

The average date of last frost is April 15 in Omaha. It might get as low as -15°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Omaha may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Omaha you get a frost after April 15 be ready to protect your achillea in the event of a surprise late frost.

USDA Zone Info for Omaha

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Omaha

You may be interested in your other planting guides for Omaha.