Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The earliest that you can plant morning glory in Barstow can be estimated 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 has passed.

It's a bad idea to plant morning glory until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant morning glory in Barstow 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 morning glory and expect a good harvest is probably September. 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 few weeks earlier.

Last Frost Date

In Barstow the average date of last frost happens on February 15. In the coldest months of winter you should expect an average low temperature of 20°F.

Just be sure to remember that USDA zone info for Barstow is not always accurate and the actual date of last frost is different every year. Half of the time in Barstow there is a last frost after February 15 so always be ready to protect your morning glory in the event of a surprise late frost.

USDA Zone Info for Barstow

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Barstow

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