The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first opportunity to plant scaevola in Riverside should be determined by checking out the USDA zone info.

Planting Calendar for Scaevola

Frost tolerance for scaevola:	Not tolerant of frost.
When to plant:	After the last frost has passed.

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

The earliest that you can plant scaevola in Riverside is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant scaevola and expect a good harvest is probably August. Any later than that and your scaevola may not have a chance to really do well. You can get started a couple of weeks earlier by starting your scaevola indoors.

Last Frost Date

The average date of last frost is April 15 in Riverside. In the coldest months of winter you can expect an average low temperature of -10°F.

Keep in mind that USDA zone info for Riverside is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Riverside you get a frost after April 15 so make sure that you are ready to protect your scaevola if you have a surprise late frost.

USDA Zone Info for Riverside

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Riverside

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