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.

By referring to the USDA zone info for Portland it's a good idea to estimate when to plant asparagus peas.

Planting Calendar for Asparagus peas

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

Asparagus peas do well in mild cold which tells us that you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant asparagus peas in Portland 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 asparagus peas and expect a good harvest is probably October. Any later than that and your asparagus peas may not have a chance to fully mature. Starting your asparagus peas indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Portland. You should expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Portland may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in Portland last frost occurs after February 15 be ready to protect your asparagus peas in the event of one of those late frosts.

USDA Zone Info for Portland

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 Portland

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