The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can estimate when to plant iceberg lettuce in Irvine by reviewing the USDA zone info.

Planting Calendar for Iceberg lettuce

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

Since iceberg lettuce do ok in moderate cold you can plant them slightly earlier in the year than more sensitive plants.

The earliest that you can plant iceberg lettuce in Irvine 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 iceberg lettuce and expect a good harvest is probably September. You probably don't want to wait any later than that or else your iceberg lettuce may not have a chance to grow to maturity. Starting your iceberg lettuce indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Remember that USDA zone info for Irvine is not always accurate and the actual date of last frost will vary from year to year. Since half of the time in Irvine you get surprised by a frost after January 31 be ready to cover your iceberg lettuce in the event of one of those late frosts.

USDA Zone Info for Irvine

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 Irvine

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