One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Lathrop you can determine when it's a good idea to plant iresene by using the USDA zone info.

Planting Calendar for Iresene

Frost tolerance for iresene:	Not tolerant of frost.
When to plant:	After the last frost.

Since iresene require warm weather you really should wait until after the last frost has passed before you can plant them.

The earliest that you can plant iresene in Lathrop is March. However, you really should wait until April 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 really do well. You can get started a couple of weeks earlier by starting your iresene indoors.

Last Frost Date

The average date of last frost is February 15 in Lathrop. In the coldest months of winter you should expect an average low temperature of 25°F.

Remember that USDA zone info for Lathrop is just an average and the actual date of last frost will vary from year to year. Half of the time in Lathrop you get a frost after February 15 so be sure to be ready to protect your iresene in the event of one of those late frosts.

USDA Zone Info for Lathrop

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 Lathrop

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