Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You will be able to determine when it's the best time to plant iresene by reviewing the USDA zone info for Rancho Cucamonga.

Planting Calendar for Iresene

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

You should not plant iresene until after the last frost has passed because they do not do well in cold weather.

The earliest that you can plant iresene in Rancho Cucamonga 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. Starting your iresene indoors is a great way to get them started a few weeks earlier.

Last Frost Date

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

Since the USDA zone info for Rancho Cucamonga is an average the actual date of last frost changes from year to year. Half of the time in Rancho Cucamonga you get a frost after February 15 so always be ready to cover your iresene if you have a late frost.

USDA Zone Info for Rancho Cucamonga

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 Rancho Cucamonga

You may be interested in your other planting guides for Rancho Cucamonga.