The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of estimating when it's a good idea to plant heuchera is to look at the USDA zone info for Crystal City.

Planting Calendar for Heuchera

Frost tolerance for heuchera:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Heuchera can survive in some cold which means that you can plant them just a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant heuchera in Crystal City 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 heuchera and expect a good harvest is probably September. You probably don't want to wait any later than that or else your heuchera may not have a chance to grow to maturity. Starting your heuchera indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Crystal City. You should expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Crystal City is just an average the actual date of last frost is different every year. Half of the time in Crystal City you get surprised by a frost after April 15 so make sure that you are prepared to cover your heuchera in the event of one of those late frosts.

USDA Zone Info for Crystal City

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Crystal City

You may be interested in your other planting guides for Crystal City.