One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of estimating when you can plant forget-me-not is to check out the USDA zone info for Riverside.

Planting Calendar for Forget-Me-Not

Frost tolerance for forget-me-not:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Forget-Me-Not are moderately cold tolerant which means that you can get them planted earlier than more sensitive plants.

The earliest that you can plant forget-me-not in Riverside 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 forget-me-not and expect a good harvest is probably September. If you wait any later than that and your forget-me-not may not have a chance to really do well. Starting your forget-me-not indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

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

Since the USDA zone info for Riverside may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Riverside you get surprised by a frost after April 15 so make sure that you are ready to protect your forget-me-not in the event of a 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.