The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. 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 determine when it's possible to plant larkspur by looking at the USDA zone info for Austin.

Planting Calendar for Larkspur

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

Larkspur do well in cold weather which means that you can plant them much earlier in the year than other frost tender plants.

The earliest that you can plant larkspur in Austin 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 larkspur and expect a good harvest is probably September. If you wait any later than that and your larkspur may not have a chance to grow to maturity. Starting your larkspur indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Austin. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Austin may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Austin you get a frost after April 15 so always be ready to cover your larkspur in the event of a late frost.

USDA Zone Info for Austin

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Austin

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