One of the best tools that you have as gardeners to help us estimate your gardening schedule is the 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.

The earliest that you can plant snapdragons in Sheldon should be determined by looking at the USDA zone info.

Planting Calendar for Snapdragons

Frost tolerance for snapdragons:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Snapdragons do well in some cold which means that you can plant them just a bit earlier in the year than plants that are more sensitive to the cold.

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

Last Frost Date

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

It's important to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Sheldon and it changes from year to year. Half of the time in Sheldon you get surprised by a frost after May 15 so always be ready to cover your snapdragons if you have a late frost.

USDA Zone Info for Sheldon

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 Sheldon

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