One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to determine when it's the best time to plant indian cress by using the USDA zone info for Boulder City.

Planting Calendar for Indian cress

Frost tolerance for indian cress:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

You should not plant indian cress until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant indian cress in Boulder City 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. If you are starting your indian cress indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Boulder City the average date of last frost happens on February 15. It might get as low as 25°F during the coldest months of winter.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Boulder City and it will vary from year to year. Since half of the time in Boulder City it frosts late in the year after February 15 be ready to cover your indian cress in the event of one of those late frosts.

USDA Zone Info for Boulder City

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 Boulder City

You may be interested in your other planting guides for Boulder City.