The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of estimating when you can plant yarrow is to use the USDA zone info for West Des Moines.

Planting Calendar for Yarrow

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

Yarrow are very cold tolerant which means that you can plant them a quite a bit earlier than other frost tender plants.

The earliest that you can plant yarrow in West Des Moines 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 yarrow and expect a good harvest is probably September. If you wait any later than that and your yarrow may not have a chance to grow to maturity. Starting your yarrow indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in West Des Moines. You can expect an average low temperature of -20°F in the coldest months of winter.

It's important to remember that USDA zone info for West Des Moines may not be accurate from year to year and the actual date of last frost changes from year to year. Since half of the time in West Des Moines it frosts late in the year after April 15 be ready to protect your yarrow in the event of a late frost.

USDA Zone Info for West Des Moines

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in West Des Moines

You may be interested in your other planting guides for West Des Moines.