The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You can figure out when it's possible to plant vinca vine in Portland by checking out the USDA zone info.

Planting Calendar for Vinca Vine

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

Vinca Vine do well in moderate cold which tells us that you can start planting them earlier than other frost tender plants.

The earliest that you can plant vinca vine in Portland 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 vinca vine and expect a good harvest is probably September. If you wait any later than that and your vinca vine may not have a chance to really do well. You can get started a few weeks earlier by starting your vinca vine indoors.

Last Frost Date

The average date of last frost is April 15 in Portland. You can expect an average low temperature of 0°F in the coldest months of winter.

Remember that USDA zone info for Portland is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Portland you get a frost after April 15 so make sure that you are prepared to cover your vinca vine if you have a late frost.

USDA Zone Info for Portland

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Portland

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