One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can determine when it's a good idea to plant morning glory in Petersburg by referring to the USDA zone info.

Planting Calendar for Morning Glory

Frost tolerance for morning glory:	Not tolerant of frost.
When to plant:	After the last frost.

Morning Glory do not do well in cold weather which tells us that you need to wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant morning glory in Petersburg is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant morning glory and expect a good harvest is probably August. Any later than that and your morning glory may not have a chance to really do well. Starting your morning glory indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Petersburg. You should expect an average low temperature of 5°F in the coldest months of winter.

Always keep in mind that USDA zone info for Petersburg is just an average and the actual date of last frost will vary from year to year. Half of the time in Petersburg you get a frost after April 15 so be sure to be ready to cover your morning glory if you have one of those late frosts.

USDA Zone Info for Petersburg

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Petersburg

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