One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Rancho Cucamonga can be reviewed to determine when to plant euphorbia.

Planting Calendar for Euphorbia

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

Euphorbia do ok in moderate cold which means that you can plant them slightly earlier than other frost tender plants.

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

Last Frost Date

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

Always keep in mind that USDA zone info for Rancho Cucamonga is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Rancho Cucamonga last frost occurs after February 15 be ready to cover your euphorbia in the event of one of those late frosts.

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.