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.

A common way of determining when it's a good idea to plant morning glory is to look at the USDA zone info for Rio Vista.

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 because they require warm weather.

The earliest that you can plant morning glory in Rio Vista 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. If you wait any later than that and your morning glory may not have a chance to fully mature. You can get started a little bit earlier by starting your morning glory indoors.

Last Frost Date

On average the last frost is on February 15 in Rio Vista. You can expect an average low temperature of 25°F in the coldest months of winter.

Always keep in mind that USDA zone info for Rio Vista may not be accurate from year to year and the actual date of last frost will vary from year to year. Since half of the time in Rio Vista you get surprised by a frost after February 15 be ready to protect your morning glory in the event of a late frost.

USDA Zone Info for Rio Vista

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Rio Vista

You may be interested in your other planting guides for Rio Vista.