One of the best tools that you have as gardeners to help us determine 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.

You can estimate when to plant watermelon in Spokane by referring to the USDA zone info.

Planting Calendar for Watermelon

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

You can not plant watermelon until after the last frost because they require warm weather.

The earliest that you can plant watermelon in Spokane 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 watermelon and expect a good harvest is probably August. Any later than that and your watermelon may not have a chance to really do well. You can get started a couple of weeks earlier by starting your watermelon indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Spokane. It might get as low as -5°F during the coldest months of winter.

Since the USDA zone info for Spokane is not always accurate the actual date of last frost changes from year to year. Half of the time in Spokane you get a frost after April 15 so make sure that you are prepared to cover your watermelon in the event of a surprise late frost.

USDA Zone Info for Spokane

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Spokane

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