One of the first steps you take when you are determining 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.

The earliest that you can plant indian cress in Petaluma should be estimated by looking at the USDA zone info.

Planting Calendar for Indian cress

Frost tolerance for indian cress:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since indian cress do not do well in cold weather it is necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant indian cress in Petaluma is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant indian cress and expect a good harvest is probably September. Any later than that and your indian cress may not have a chance to really do well. You can get started a little bit earlier by starting your indian cress indoors.

Last Frost Date

On average all chance of frost has passed is on February 15 in Petaluma. In the coldest months of winter you should expect an average low temperature of 25°F.

Since the USDA zone info for Petaluma is an average the actual date of last frost is different every year. Since half of the time in Petaluma you get a frost after February 15 be ready to cover your indian cress in the event of a surprise late frost.

USDA Zone Info for Petaluma

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 Petaluma

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