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 USDA zone info for Rialto should be used to estimate when it's possible to plant nemesia.

Planting Calendar for Nemesia

Frost tolerance for nemesia:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since nemesia do not do well in cold weather you have to wait until after the last frost before you can plant them.

The earliest that you can plant nemesia in Rialto 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 nemesia and expect a good harvest is probably September. You probably don't want to wait any later than that or else your nemesia may not have a chance to really do well. Starting your nemesia indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Since the USDA zone info for Rialto is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Rialto you get surprised by a frost after January 31 be ready to protect your nemesia in the event of 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.