One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Vacaville you can determine when it's the best time to plant oriental poppies by referring to 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.

Oriental poppies do well in moderate cold which tells us that you can plant them earlier than other plants that might not handle the cold.

The earliest that you can plant oriental poppies in Vacaville 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. You probably don't want to wait any later than that or else 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 the last frost when the weather gets warmer is on February 15 in Vacaville. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Vacaville is not always accurate the actual date of last frost is different every year. Half of the time in Vacaville it frosts late in the year after February 15 so always be ready to protect your oriental poppies in the event of one of those late frosts.

USDA Zone Info for Vacaville

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Vacaville

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