The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Campbell you can estimate when it's the best time to plant kohlrabi by looking at the USDA zone info.

Planting Calendar for Kohlrabi

Frost tolerance for kohlrabi:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Kohlrabi can survive in mild cold which tells us that you can plant them a little bit earlier in the year than more sensitive plants.

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

Last Frost Date

The average date of last frost is April 15 in Campbell. In the coldest months of winter you can expect an average low temperature of -10°F.

Keep in mind that USDA zone info for Campbell is just an average and the actual date of last frost changes from year to year. Since half of the time in Campbell you get surprised by a frost after April 15 be ready to protect your kohlrabi in the event of one of those late frosts.

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.