One of the best tools that you have as gardeners to help us figure out 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 checking out the USDA zone info for Luverne it's possible to figure out when it's possible to plant sunflowers.

Planting Calendar for Sunflowers

Frost tolerance for sunflowers:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since sunflowers are not cold tolerant it's necessary to wait until after the last frost before you can plant them.

The earliest that you can plant sunflowers in Luverne 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 sunflowers and expect a good harvest is probably August. You probably don't want to wait any later than that or else your sunflowers may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your sunflowers indoors.

Last Frost Date

The average date of last frost is May 15 in Luverne. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Luverne is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Luverne there is a last frost after May 15 be ready to protect your sunflowers if you have a surprise late frost.

USDA Zone Info for Luverne

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°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 -20°F.

Plants to Grow in Luverne

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