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.

It's a good idea to figure out when it's the best time to plant hamelia by checking out the USDA zone info for Portland.

Planting Calendar for Hamelia

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

Since hamelia are not cold tolerant it's necessary to wait until after the last frost before you can plant them.

The earliest that you can plant hamelia 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 hamelia and expect a good harvest is probably August. If you wait any later than that and your hamelia may not have a chance to grow to maturity. If you are starting your hamelia indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Portland. In the coldest months of winter you should expect an average low temperature of -15°F.

Since the USDA zone info for Portland is just an average 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 always be ready to protect your hamelia 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.