One of the best tools that you have as gardeners to help us figure out 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.

One way of estimating when you can plant periwinkles is to use the USDA zone info for Laguna Hills.

Planting Calendar for Periwinkles

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

Since periwinkles are not cold tolerant it's necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant periwinkles in Laguna Hills 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 periwinkles and expect a good harvest is probably September. Any later than that and your periwinkles may not have a chance to grow to maturity. You can get started a little bit earlier by starting your periwinkles indoors.

Last Frost Date

The average date of last frost is January 31 in Laguna Hills. In the coldest months of winter you can expect an average low temperature of 30°F.

Since the USDA zone info for Laguna Hills is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Laguna Hills there is a last frost after January 31 be ready to protect your periwinkles if you have one of those late frosts.

USDA Zone Info for Laguna Hills

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 Laguna Hills

You may be interested in your other planting guides for Laguna Hills.