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 first chance to plant broccoli in Rialto should be determined by reviewing the USDA zone info.

Planting Calendar for Broccoli

Frost tolerance for broccoli:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Broccoli do ok in some cold which means that you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant broccoli in Rialto is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant broccoli and expect a good harvest is probably October. Any later than that and your broccoli may not have a chance to really do well. You can get started a little bit earlier by starting your broccoli indoors.

Last Frost Date

On average all chance of frost has passed is on January 31 in Rialto. In the coldest months of winter you should expect an average low temperature of 30°F.

Remember that USDA zone info for Rialto is not always accurate and the actual date of last frost is different every year. Half of the time in Rialto last frost occurs after January 31 so make sure that you are ready to cover your broccoli in the event of a late frost.

USDA Zone Info for Rialto

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 Rialto

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