Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can determine when it's a good idea to plant oriental poppies in Rialto by using the USDA zone info.

Planting Calendar for Oriental poppies

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

You can plant oriental poppies just a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant oriental poppies 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 oriental poppies and expect a good harvest is probably October. Any later than that and your oriental poppies may not have a chance to really do well. You can get started a little bit earlier by starting your oriental poppies indoors.

Last Frost Date

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

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Rialto and it is different every year. Since half of the time in Rialto you get surprised by a frost after January 31 be ready to protect your oriental poppies in the event of a surprise 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.