One of the best tools that you have as gardeners to help us figure out 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 estimate when it's the best time to plant cucumbers by reviewing the USDA zone info.

Planting Calendar for Cucumbers

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

You really shouldn't plant cucumbers until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant cucumbers 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 cucumbers and expect a good harvest is probably September. You probably don't want to wait any later than that or else your cucumbers may not have a chance to really do well. You can get started a couple of weeks earlier by starting your cucumbers indoors.

Last Frost Date

On average all chance of frost has passed is on February 15 in Portland. You should expect an average low temperature of 25°F in the coldest months of winter.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Portland and it will vary from year to year. Since half of the time in Portland last frost occurs after February 15 be ready to protect your cucumbers if you have one of those late frosts.

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.