One of the best tools that you have as gardeners to help us figure out 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 making a decision about when it's the best time to plant morning glory is to refer to the USDA zone info for Granite City.

Planting Calendar for Morning Glory

Frost tolerance for morning glory:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

You can not plant morning glory until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant morning glory in Granite City 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. You probably don't want to wait any later than that or else your morning glory may not have a chance to fully mature. If you are starting your morning glory indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost is on April 15 in Granite City. You can expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Granite City is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Granite City last frost occurs after April 15 be ready to protect your morning glory in the event of a surprise late frost.

USDA Zone Info for Granite City

Here is the info for USDA Zone 6b.

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

Plants to Grow in Granite City

You may be interested in your other planting guides for Granite City.