One of the first steps you take when you are figuring out 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.

A common way of determining when it's the best time to plant asparagus fern is to look at the USDA zone info for Campbell.

Planting Calendar for Asparagus Fern

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

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

The earliest that you can plant asparagus fern in Campbell 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 asparagus fern and expect a good harvest is probably August. Any later than that and your asparagus fern may not have a chance to fully mature. You can get started a little bit earlier by starting your asparagus fern indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Campbell. It might get as low as -10°F during the coldest months of winter.

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Campbell and it changes from year to year. Half of the time in Campbell you get surprised by a frost after April 15 so make sure that you are prepared to protect your asparagus fern if you have a surprise late frost.

USDA Zone Info for Campbell

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Campbell

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