The USDA Zone info is a great tool for gardeners to help us determine 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.

A common way of figuring out when to plant iresene is to consult the USDA zone info for San Pablo.

Planting Calendar for Iresene

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

Since iresene are not cold tolerant you need to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant iresene in San Pablo 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 iresene and expect a good harvest is probably September. If you wait any later than that and your iresene may not have a chance to fully mature. You can get started a little bit earlier by starting your iresene indoors.

Last Frost Date

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

Since the USDA zone info for San Pablo is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in San Pablo you get surprised by a frost after January 31 so always be ready to cover your iresene if you have a surprise late frost.

USDA Zone Info for San Pablo

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 San Pablo

You may be interested in your other planting guides for San Pablo.