One of the first steps you take when you are getting a good idea 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.

By referring to the USDA zone info for Arroyo Grande it's possible to estimate when it's the best time 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.

It's probably a bad idea to plant watermelon until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant watermelon in Arroyo Grande 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. Any later than that and your watermelon may not have a chance to grow to maturity. You can get started a little bit earlier by starting your watermelon indoors.

Last Frost Date

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

It's important to remember that USDA zone info for Arroyo Grande may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Arroyo Grande you get surprised by a frost after February 15 so just be sure to be ready to protect your watermelon in the event of a surprise late frost.

USDA Zone Info for Arroyo Grande

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 Arroyo Grande

You may be interested in your other planting guides for Arroyo Grande.