One of the first steps you take when you are making a decision about 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.

A common way of making a decision about when it's possible to plant nasturtium is to refer to the USDA zone info for Santa Ana.

Planting Calendar for Nasturtium

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

You really shouldn't plant nasturtium until after the last frost has passed because they require warm weather.

The earliest that you can plant nasturtium in Santa Ana 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 nasturtium and expect a good harvest is probably September. Any later than that and your nasturtium may not have a chance to grow to maturity. You can get started a little bit earlier by starting your nasturtium indoors.

Last Frost Date

On average the last frost has passed is on January 31 in Santa Ana. It might get as low as 30°F during the coldest months of winter.

Since the USDA zone info for Santa Ana is an average the actual date of last frost changes from year to year. Half of the time in Santa Ana you get surprised by a frost after January 31 so always be ready to protect your nasturtium in the event of one of those late frosts.

USDA Zone Info for Santa Ana

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Santa Ana

You may be interested in your other planting guides for Santa Ana.