Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By looking at the USDA zone info for Santa Clara you should be able to determine when it's a good idea to plant nasturtium.

Planting Calendar for Nasturtium

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

Since nasturtium require warm weather it is important to wait until after the last frost has passed before you can plant them.

The earliest that you can plant nasturtium in Santa Clara 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 nasturtium and expect a good harvest is probably September. You probably don't want to wait any later than that or else your nasturtium may not have a chance to fully mature. Starting your nasturtium indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Santa Clara the average date of last frost happens on February 15. In the coldest months of winter you should expect an average low temperature of 25°F.

Since the USDA zone info for Santa Clara is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Santa Clara it frosts late in the year after February 15 so be sure to be ready to cover your nasturtium in the event of one of those late frosts.

USDA Zone Info for Santa Clara

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 Santa Clara

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