Before planting it is a good idea to find your USDA Zone info to figure out your garden 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 Portland should be looked at to determine when it's the best time to plant scabiosa.

Planting Calendar for Scabiosa

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

You can plant scabiosa a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant scabiosa 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 scabiosa and expect a good harvest is probably October. If you wait any later than that and your scabiosa may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your scabiosa indoors.

Last Frost Date

On average the last frost is on February 15 in Portland. It might get as low as 25°F during the coldest months of winter.

Always keep in mind that USDA zone info for Portland is not always accurate and the actual date of last frost is different every year. Half of the time in Portland you get a frost after February 15 so make sure that you are ready to cover your scabiosa if you have a surprise late frost.

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.