The USDA Zone info is a great tool for gardeners to help us estimate your gardening 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 Umatilla can be reffered to in order to figure out when it's possible to plant oriental poppies.

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 a little bit earlier in the year because they do well in moderate cold.

The earliest that you can plant oriental poppies in Umatilla 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 oriental poppies and expect a good harvest is probably September. Any later than that and your oriental poppies may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your oriental poppies indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Umatilla. It might get as low as 5°F during the coldest months of winter.

Remember that USDA zone info for Umatilla is an average and the actual date of last frost changes from year to year. Half of the time in Umatilla you get a frost after April 15 so always be ready to protect your oriental poppies if you have a late frost.

USDA Zone Info for Umatilla

Here is the info for USDA Zone 7b.

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

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

Plants to Grow in Umatilla

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