Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of making a decision about when you can plant violas is to consult the USDA zone info for Gladstone.

Planting Calendar for Violas

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

Since violas do well in cold you can plant them earlier in the year than other plants that might not handle the cold.

The earliest that you can plant violas in Gladstone 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 violas and expect a good harvest is probably September. Any later than that and your violas may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your violas indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Gladstone. It might get as low as -20°F during the coldest months of winter.

Remember that USDA zone info for Gladstone is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Gladstone it frosts late in the year after April 15 so just be sure to be ready to protect your violas in the event of one of those late frosts.

USDA Zone Info for Gladstone

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°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 -15°F.

Plants to Grow in Gladstone

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