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.

In Thomaston you can estimate when it's a good idea to plant larkspur by referring to the USDA zone info.

Planting Calendar for Larkspur

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

Since larkspur do well in cold you can plant them earlier in the year than other frost tender plants.

The earliest that you can plant larkspur in Thomaston 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 really do well. You can get started a couple of weeks earlier by starting your larkspur indoors.

Last Frost Date

The average date of last frost is March 15 in Thomaston. It might get as low as 10°F during the coldest months of winter.

Since the USDA zone info for Thomaston is an average the actual date of last frost will vary from year to year. Half of the time in Thomaston you get surprised by a frost after March 15 so just be sure to be ready to cover your larkspur in the event of a surprise late frost.

USDA Zone Info for Thomaston

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Thomaston

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