One of the best tools that you have as gardeners to help us estimate your gardening schedule is the 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.

The first opportunity to plant dahlberg daisy in Portland can be determined by looking at the USDA zone info.

Planting Calendar for Dahlberg Daisy

Frost tolerance for dahlberg daisy:	Not tolerant of frost.
When to plant:	After the last frost.

Since dahlberg daisy are not cold tolerant you need to wait until after the last frost has passed before you can plant them.

The earliest that you can plant dahlberg daisy in Portland is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant dahlberg daisy and expect a good harvest is probably August. Any later than that and your dahlberg daisy may not have a chance to fully mature. You can get started a little bit earlier by starting your dahlberg daisy indoors.

Last Frost Date

On average the last frost is on April 15 in Portland. In the coldest months of winter you can expect an average low temperature of -15°F.

Keep in mind that USDA zone info for Portland is just an average and the actual date of last frost is different every year. Half of the time in Portland you get a frost after April 15 so just be sure to be ready to cover your dahlberg daisy if you have a late frost.

USDA Zone Info for Portland

Here is the info for USDA Zone 5b.

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

Plants to Grow in Portland

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