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.

It's a good idea to determine when you can plant penstemon by referring to the USDA zone info for Youngsville.

Planting Calendar for Penstemon

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

Penstemon can survive in some cold which tells us that you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant penstemon in Youngsville 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 penstemon and expect a good harvest is probably October. If you wait any later than that and your penstemon may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your penstemon indoors.

Last Frost Date

On average the last frost is on February 15 in Youngsville. In the coldest months of winter you should expect an average low temperature of 20°F.

Since the USDA zone info for Youngsville is just an average the actual date of last frost will vary from year to year. Half of the time in Youngsville there is a last frost after February 15 so be sure to be ready to cover your penstemon in the event of a late frost.

USDA Zone Info for Youngsville

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°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 25°F.

Plants to Grow in Youngsville

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