Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for San Diego can be reffered to in order to determine when it's a good idea to plant melons.

Planting Calendar for Melons

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

It's probably a bad idea to plant melons until after all chance of frost has passed because they do not do well in cold weather.

The earliest that you can plant melons in San Diego is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant melons and expect a good harvest is probably September. You probably don't want to wait any later than that or else your melons may not have a chance to really do well. If you are starting your melons indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is January 31 in San Diego. You can expect an average low temperature of 35°F in the coldest months of winter.

Since the USDA zone info for San Diego is just an average the actual date of last frost changes from year to year. Since half of the time in San Diego you get surprised by a frost after January 31 be ready to cover your melons if you have a late frost.

USDA Zone Info for San Diego

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in San Diego

You may be interested in your other planting guides for San Diego.