Before planting it is a good idea to find your USDA Zone info to estimate your garden 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 lenten rose in Rialto can be determined by referring to the USDA zone info.

Planting Calendar for Lenten Rose

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

Lenten Rose do well in moderate cold which tells us that you can start planting them earlier than other frost tender plants.

The earliest that you can plant lenten rose 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 lenten rose and expect a good harvest is probably October. If you wait any later than that and your lenten rose may not have a chance to grow to maturity. You can get started a little bit earlier by starting your lenten rose indoors.

Last Frost Date

The average date of last frost is January 31 in Rialto. You can expect an average low temperature of 30°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Rialto is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Rialto it frosts late in the year after January 31 so make sure that you are ready to protect your lenten rose 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.