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.

The USDA zone info for Belfast should be looked at to estimate when you can plant cucumbers.

Planting Calendar for Cucumbers

Frost tolerance for cucumbers:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

You can not plant cucumbers until after the last frost has passed because they do not do well in cold weather.

The earliest that you can plant cucumbers in Belfast 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 cucumbers and expect a good harvest is probably August. Any later than that and your cucumbers may not have a chance to really do well. Starting your cucumbers indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Belfast. You can expect an average low temperature of -15°F in the coldest months of winter.

It's important to remember that USDA zone info for Belfast is not always accurate and the actual date of last frost changes from year to year. Half of the time in Belfast you get a frost after April 15 so be sure to be ready to protect your cucumbers in the event of a surprise late frost.

USDA Zone Info for Belfast

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 Belfast

You may be interested in your other planting guides for Belfast.