One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of estimating when you can plant morning glory is to refer to the USDA zone info for Rosemead.

Planting Calendar for Morning Glory

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

Morning Glory are not cold tolerant which tells us that it's necessary 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 Rosemead is February. However, you really should wait until March 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 really do well. 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 January 31 in Rosemead. It might get as low as 30°F during the coldest months of winter.

Keep in mind that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Rosemead and it will vary from year to year. Since half of the time in Rosemead it frosts late in the year after January 31 be ready to protect your morning glory if you have a late frost.

USDA Zone Info for Rosemead

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Rosemead

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