One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of getting a good idea when it's possible to plant steirodiscus is to consult the USDA zone info for Vincennes.

Planting Calendar for Steirodiscus

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

You can plant steirodiscus slightly earlier in the year because they are barely cold tolerant.

The earliest that you can plant steirodiscus 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 steirodiscus and expect a good harvest is probably August. Any later than that and your steirodiscus may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your steirodiscus indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Vincennes. In the coldest months of winter you should expect an average low temperature of -10°F.

Since the USDA zone info for Vincennes is an average the actual date of last frost will vary from year to year. Half of the time in Vincennes you get a frost after April 15 so just be sure to be ready to protect your steirodiscus 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.