One of the first steps you take when you are making a decision about your gardening schedule is find your 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.

In San Jose you can figure out when to plant sweet potato vine by referring to the USDA zone info.

Planting Calendar for Sweet Potato Vine

Frost tolerance for sweet potato vine:	Not tolerant of frost.
When to plant:	After the last frost.

Since sweet potato vine require warm weather it's necessary to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant sweet potato vine in San Jose 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 potato vine and expect a good harvest is probably September. If you wait any later than that and your sweet potato vine may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your sweet potato vine indoors.

Last Frost Date

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

Keep in mind that USDA zone info for San Jose may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in San Jose you get surprised by a frost after February 15 so be sure to be ready to protect your sweet potato vine in the event of one of those late frosts.

USDA Zone Info for San Jose

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 San Jose

You may be interested in your other planting guides for San Jose.