Before planting it is a good idea to find your USDA Zone info to estimate 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 best time to plant moon vine in Washington can be figured out by looking at the USDA zone info.

Planting Calendar for Moon Vine

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

Since moon vine are not cold tolerant you really should wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant moon vine in Washington 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. You probably don't want to wait any later than that or else your moon vine may not have a chance to fully mature. Starting your moon vine indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Washington the average date of last frost happens on April 15. You should expect an average low temperature of -15°F in the coldest months of winter.

Always keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Washington and it changes from year to year. Since half of the time in Washington it frosts late in the year after April 15 be ready to cover your moon vine if you have a late frost.

USDA Zone Info for Washington

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 Washington

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