One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Portland you can determine when you can plant jasmine by looking at the USDA zone info.

Planting Calendar for Jasmine

Frost tolerance for jasmine:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Jasmine do not do well in cold weather which tells us that you must 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 jasmine 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 jasmine and expect a good harvest is probably September. You probably don't want to wait any later than that or else your jasmine may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your jasmine indoors.

Last Frost Date

The average date of last frost is February 15 in Portland. In the coldest months of winter you can expect an average low temperature of 25°F.

It's important to remember that the actual date of last frost is an average because it is based on the USDA zone info for Portland and it can change quite a bit from year to year. Since half of the time in Portland it frosts late in the year after February 15 be ready to protect your jasmine if you have 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.