One of the best tools that you have as gardeners to help us estimate 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.

By referring to the USDA zone info for Mesa it's possible to figure out when it's possible 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 are not cold tolerant 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 Mesa 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 little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Mesa. In the coldest months of winter you can expect an average low temperature of 25°F.

It's important to remember that USDA zone info for Mesa may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Mesa there is a last frost after February 15 be ready to protect your nasturtium if you have a late frost.

USDA Zone Info for Mesa

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 Mesa

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