One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to estimate when it's a good idea to plant bittercress by looking at the USDA zone info for Campbell.

Planting Calendar for Bittercress

Frost tolerance for bittercress:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

You can plant bittercress just a tiny bit earlier in the year because they do ok in moderate cold.

The earliest that you can plant bittercress 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 bittercress and expect a good harvest is probably September. Any later than that and your bittercress may not have a chance to grow to maturity. Starting your bittercress indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is February 15 in Campbell. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Campbell may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Campbell last frost occurs after February 15 so make sure that you are prepared to protect your bittercress in the event of one of those late frosts.

USDA Zone Info for Campbell

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 Campbell

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