One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By checking out the USDA zone info for Rancho Cucamonga it's possible to determine when it's a good idea to plant watermelon.

Planting Calendar for Watermelon

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

Watermelon require warm weather which tells us that it's necessary to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant watermelon in Rancho Cucamonga 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 watermelon and expect a good harvest is probably September. You probably don't want to wait any later than that or else your watermelon may not have a chance to fully mature. You can get started a few weeks earlier by starting your watermelon indoors.

Last Frost Date

The average date of last frost is February 15 in Rancho Cucamonga. In the coldest months of winter you should expect an average low temperature of 25°F.

Remember that USDA zone info for Rancho Cucamonga is just an average and the actual date of last frost will vary from year to year. Half of the time in Rancho Cucamonga you get surprised by a frost after February 15 so make sure that you are ready to protect your watermelon in the event of a late frost.

USDA Zone Info for Rancho Cucamonga

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 Rancho Cucamonga

You may be interested in your other planting guides for Rancho Cucamonga.