One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to figure out when it's possible to plant yarrow by referring to the USDA zone info for Hidalgo.

Planting Calendar for Yarrow

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

Since yarrow do well in cold you can plant them earlier in the year than more sensitive plants.

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

The last month that you can plant yarrow and expect a good harvest is probably October. You probably don't want to wait any later than that or else your yarrow may not have a chance to fully mature. You can get started a few weeks earlier by starting your yarrow indoors.

Last Frost Date

The average date of last frost is February 15 in Hidalgo. In the coldest months of winter you can expect an average low temperature of 25°F.

Since the USDA zone info for Hidalgo is an average the actual date of last frost will vary from year to year. Since half of the time in Hidalgo you get surprised by a frost after February 15 be ready to cover your yarrow in the event of a surprise late frost.

USDA Zone Info for Hidalgo

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Hidalgo

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