Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Portland should be reviewed to determine when it's the best time to plant moon vine.

Planting Calendar for Moon Vine

Frost tolerance for moon vine:	Not tolerant of frost.
When to plant:	After the last frost.

Moon Vine do not do well in cold weather which tells us that it is necessary to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant moon vine 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 moon vine and expect a good harvest is probably August. Any later than that and your moon vine may not have a chance to really do well. You can get started a few weeks earlier by starting your moon vine indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Portland. You can expect an average low temperature of -15°F in the coldest months of winter.

Keep in mind that USDA zone info for Portland is just an average and the actual date of last frost will vary from year to year. Half of the time in Portland it frosts late in the year after April 15 so make sure that you are prepared to cover your moon vine if you have one of those late frosts.

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.