When can I plant Morning Glory in Zone 1b

The USDA Zone info is a great tool for gardeners to help us figure out our gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

A way of determining when it's a good idea to plant morning glory is to consult the USDA zone info for Zone 1b.


Planting Calendar for Morning Glory

Frost tolerance for morning glory: Not tolerant of frost.
When you should plant them: After the last frost has passed.

Morning Glory are not cold tolerant which means that it's necessary to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant morning glory
Possibly ok, but a risky time to plant morning glory
Probably not a good time to plant morning glory

The earliest that you can plant morning glory in Zone 1b is June. However, you really should wait until July 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 July. Any later than that and your morning glory may not have a chance to fully mature. Starting your morning glory indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on June 15 in Zone 1b. We can expect an average low temperature of -55°F in the coldest months of winter.

Keep in mind that USDA zone info for Zone 1b is an average and our actual date of last frost can change quite a bit from year to year. Since half of the time in Zone 1b we get a frost after June 15 be ready to cover your morning glory in the event of one of those late frosts.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-55°F
Highest Expected Low-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in our other planting guides for Zone 1b.