One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first chance to plant sweet peas in Signal Hill can be estimated by referring to the USDA zone info.

Planting Calendar for Sweet Peas

Frost tolerance for sweet peas:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Sweet Peas are one of those plants that can tolerate a tiny bit of cold weather which tells us that you can start planting them slightly earlier than other plants that might not handle the cold.

The earliest that you can plant sweet peas 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 sweet peas and expect a good harvest is probably September. You probably don't want to wait any later than that or else your sweet peas may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your sweet peas indoors.

Last Frost Date

In Signal Hill the average date of last frost happens on January 31. You should expect an average low temperature of 35°F in the coldest months of winter.

Keep in mind that USDA zone info for Signal Hill may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Signal Hill last frost occurs after January 31 be ready to cover your sweet peas if you have 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.