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.

By checking out the USDA zone info for Sheldon you should be able to figure out when to plant ajuga.

Planting Calendar for Ajuga

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

Ajuga are one of those plants that can tolerate quite a bit of cold weather which tells us that you can start planting them much earlier than plants that are more sensitive to the cold.

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

Last Frost Date

In Sheldon the average date of last frost happens on May 15. You can expect an average low temperature of -25°F in the coldest months of winter.

Remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Sheldon and it can change quite a bit from year to year. Half of the time in Sheldon it frosts late in the year after May 15 so make sure that you are prepared to protect your ajuga in the event of 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.