The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first chance to plant polka dot plant in Signal Hill should be determined by reviewing the USDA zone info.

Planting Calendar for Polka Dot Plant

Frost tolerance for polka dot plant:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since polka dot plant are not cold tolerant it's important to wait until after the last frost before you can plant them.

The earliest that you can plant polka dot plant in Signal Hill 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 polka dot plant and expect a good harvest is probably September. If you wait any later than that and your polka dot plant may not have a chance to really do well. If you are starting your polka dot plant indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average the last frost has passed is on January 31 in Signal Hill. You should expect an average low temperature of 35°F in the coldest months of winter.

Since the USDA zone info for Signal Hill is an average the actual date of last frost will vary from year to year. Half of the time in Signal Hill last frost occurs after January 31 so be sure to be ready to cover your polka dot plant in the event of a late frost.

USDA Zone Info for Signal Hill

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in Signal Hill

You may be interested in your other planting guides for Signal Hill.