The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of estimating when it's the best time to plant violas is to check out the USDA zone info for Marana.

Planting Calendar for Violas

Frost tolerance for violas:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Violas are one of those plants that can tolerate quite a bit of cold weather which means that you can plant them much earlier than other plants that might not handle the cold.

The earliest that you can plant violas in Marana is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant violas and expect a good harvest is probably October. Any later than that and your violas may not have a chance to really do well. You can get started a couple of weeks earlier by starting your violas indoors.

Last Frost Date

The average date of last frost is February 15 in Marana. In the coldest months of winter you should expect an average low temperature of 20°F.

Keep in mind that USDA zone info for Marana is just an average and the actual date of last frost is different every year. Since half of the time in Marana last frost occurs after February 15 be ready to protect your violas if you have a surprise late frost.

USDA Zone Info for Marana

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Marana

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