One of the first steps you take when you are making a decision about your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of getting a good idea when it's possible to plant axilflower is to consult the USDA zone info for Portland.

Planting Calendar for Axilflower

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

You should not plant axilflower until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant axilflower 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 axilflower and expect a good harvest is probably August. Any later than that and your axilflower may not have a chance to really do well. If you are starting your axilflower indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

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

Just be sure to remember that USDA zone info for Portland may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Portland you get surprised by a frost after April 15 so make sure that you are ready to cover your axilflower in the event of 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.