Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The earliest that you can plant asparagus fern in Costa Mesa can be figured out by checking out the USDA zone info.

Planting Calendar for Asparagus Fern

Frost tolerance for asparagus fern:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since asparagus fern require warm weather it is necessary to wait until after all chance of frost has passed before you can plant them.

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

Last Frost Date

The average date of last frost is January 31 in Costa Mesa. In the coldest months of winter you should expect an average low temperature of 35°F.

Always keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Costa Mesa and it will vary from year to year. Since half of the time in Costa Mesa it frosts late in the year after January 31 be ready to cover your asparagus fern if you have a surprise late frost.

USDA Zone Info for Costa Mesa

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 Costa Mesa

You may be interested in your other planting guides for Costa Mesa.