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 USDA zone info for Pasadena can be reviewed to estimate when it's a good idea to plant sweet potatos.

Planting Calendar for Sweet Potatos

Frost tolerance for sweet potatos:	Not tolerant of frost.
When to plant:	After the last frost has passed.

It's not a good idea to plant sweet potatos until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant sweet potatos in Pasadena 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 sweet potatos and expect a good harvest is probably September. Any later than that and your sweet potatos may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your sweet potatos indoors.

Last Frost Date

The average date of last frost is February 15 in Pasadena. You can expect an average low temperature of 20°F in the coldest months of winter.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Pasadena and it will vary from year to year. Since half of the time in Pasadena there is a last frost after February 15 be ready to cover your sweet potatos in the event of a surprise late frost.

USDA Zone Info for Pasadena

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 Pasadena

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