One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's a good idea to estimate when it's possible to plant four-o-clock flower by using the USDA zone info for Sartell.

Planting Calendar for Four-o-clock flower

Frost tolerance for four-o-clock flower:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since four-o-clock flower require warm weather you need to wait until after the last frost has passed before you can plant them.

The earliest that you can plant four-o-clock flower in Sartell is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant four-o-clock flower and expect a good harvest is probably August. You probably don't want to wait any later than that or else your four-o-clock flower may not have a chance to really do well. You can get started a couple of weeks earlier by starting your four-o-clock flower indoors.

Last Frost Date

The average date of last frost is May 15 in Sartell. You should expect an average low temperature of -30°F in the coldest months of winter.

Since the USDA zone info for Sartell is an average the actual date of last frost changes from year to year. Half of the time in Sartell it frosts late in the year after May 15 so make sure that you are prepared to cover your four-o-clock flower if you have one of those late frosts.

USDA Zone Info for Sartell

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°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 -25°F.

Plants to Grow in Sartell

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