The USDA Zone info is a great tool for gardeners to help us estimate your gardening 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 read to determine when it's a good idea to plant moon vine.

Planting Calendar for Moon Vine

Frost tolerance for moon vine:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Moon Vine are not cold tolerant which means that you have to wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant moon vine in Portland is March. However, you really should wait until April 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 September. You probably don't want to wait any later than that or else your moon vine may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your moon vine indoors.

Last Frost Date

On average the last frost has passed is on February 15 in Portland. In the coldest months of winter you should expect an average low temperature of 25°F.

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. Half of the time in Portland there is a last frost after February 15 so always be ready to protect your moon vine in the event of a 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.