The USDA Zone info is a great tool for gardeners to help us estimate 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.

In Oconomowoc you can determine when it's the best time to plant larkspur by checking out 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.

Larkspur do well in cold which tells us that you can get them planted much earlier than other plants that might not handle the cold.

The earliest that you can plant larkspur in Oconomowoc 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. Any later than that and your larkspur may not have a chance to really do well. You can get started a little bit earlier by starting your larkspur indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Oconomowoc. It might get as low as -20°F during the coldest months of winter.

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

USDA Zone Info for Oconomowoc

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°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 -15°F.

Plants to Grow in Oconomowoc

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