The USDA Zone info is a great tool for gardeners to help us determine 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.

It's possible to figure out when it's the best time to plant plectranthus by looking at the USDA zone info for Portland.

Planting Calendar for Plectranthus

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

Since plectranthus are not cold tolerant it is necessary to wait until after the last frost when the weather gets warmer before you can plant them.

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

Last Frost Date

On average the last frost has passed is on February 15 in Portland. It might get as low as 25°F during the coldest months of winter.

Always keep in mind that USDA zone info for Portland is an average and the actual date of last frost will vary from year to year. Since half of the time in Portland it frosts late in the year after February 15 be ready to cover your plectranthus if you have a surprise 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.