The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of figuring out when it's possible to plant lemon grass is to examine the USDA zone info for Rialto.

Planting Calendar for Lemon grass

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

You can plant lemon grass slightly earlier in the year because they do ok in moderate cold.

The earliest that you can plant lemon grass 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 lemon grass and expect a good harvest is probably September. You probably don't want to wait any later than that or else your lemon grass may not have a chance to really do well. You can get started a couple of weeks earlier by starting your lemon grass 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.

Always keep in mind that USDA zone info for Rialto is an average and the actual date of last frost is different every year. Half of the time in Rialto last frost occurs after January 31 so just be sure to be ready to protect your lemon grass 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.