One of the best tools that you have as gardeners to help us figure out your gardening schedule is the 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.

It's a good idea to figure out when it's possible to plant strawflowers by referring to the USDA zone info for Vincennes.

Planting Calendar for Strawflowers

Frost tolerance for strawflowers:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Strawflowers do well in some cold which means that you can plant them just a tiny bit earlier in the year than more sensitive plants.

The earliest that you can plant strawflowers in Vincennes is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant strawflowers and expect a good harvest is probably August. If you wait any later than that and your strawflowers may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your strawflowers indoors.

Last Frost Date

In Vincennes the average date of last frost happens on April 15. In the coldest months of winter you should expect an average low temperature of -10°F.

Since the USDA zone info for Vincennes is just an average the actual date of last frost will vary from year to year. Half of the time in Vincennes it frosts late in the year after April 15 so make sure that you are ready to cover your strawflowers in the event of a surprise late frost.

USDA Zone Info for Vincennes

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 Vincennes

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