One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to determine when it's the best time to plant larkspur by referring to the USDA zone info for College Place.

Planting Calendar for Larkspur

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

Larkspur can survive in cold weather which tells us that you can plant them much earlier in the year than other frost tender plants.

The earliest that you can plant larkspur in College Place 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. You can get started a few weeks earlier by starting your larkspur indoors.

Last Frost Date

On average the last frost is on April 15 in College Place. You can expect an average low temperature of 0°F in the coldest months of winter.

Since the USDA zone info for College Place may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in College Place it frosts late in the year after April 15 so just be sure to be ready to cover your larkspur in the event of a late frost.

USDA Zone Info for College Place

Here is the info for USDA Zone 7a.

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

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

Plants to Grow in College Place

You may be interested in your other planting guides for College Place.