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.

The best time to plant pansies in Rialto should be estimated by looking at the USDA zone info.

Planting Calendar for Pansies

Frost tolerance for pansies:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since pansies are very cold tolerant you can plant them much earlier in the year than more sensitive plants.

The earliest that you can plant pansies 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 pansies and expect a good harvest is probably October. If you wait any later than that and your pansies may not have a chance to fully mature. You can get started a few weeks earlier by starting your pansies indoors.

Last Frost Date

In Rialto the average date of last frost happens on January 31. In the coldest months of winter you should expect an average low temperature of 30°F.

Since the USDA zone info for Rialto is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Rialto last frost occurs after January 31 be ready to protect your pansies if you have one of those late frosts.

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.