One of the first steps you take when you are getting a good idea your gardening schedule is find your 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.

In Tualatin you can determine when to plant poppies by reviewing the USDA zone info.

Planting Calendar for Poppies

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

Since poppies do well in moderate cold you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant poppies in Tualatin 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 poppies and expect a good harvest is probably September. If you wait any later than that and your poppies may not have a chance to grow to maturity. Starting your poppies indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is March 15 in Tualatin. You should expect an average low temperature of 15°F in the coldest months of winter.

Since the USDA zone info for Tualatin is just an average the actual date of last frost will vary from year to year. Half of the time in Tualatin last frost occurs after March 15 so make sure that you are prepared to cover your poppies in the event of one of those late frosts.

USDA Zone Info for Tualatin

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Tualatin

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