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

The best time to plant iceberg lettuce in Rohnert Park should be determined by using 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.

Iceberg lettuce do ok in some cold which means that you can plant them just a tiny bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant iceberg lettuce in Rohnert Park 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. Any later than that and your iceberg lettuce may not have a chance to fully mature. You can get started a little bit earlier by starting your iceberg lettuce indoors.

Last Frost Date

The average date of last frost is February 15 in Rohnert Park. You can expect an average low temperature of 25°F in the coldest months of winter.

Remember that USDA zone info for Rohnert Park is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in Rohnert Park there is a last frost after February 15 be ready to protect your iceberg lettuce if you have a surprise late frost.

USDA Zone Info for Rohnert Park

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 Rohnert Park

You may be interested in your other planting guides for Rohnert Park.