Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for New Ulm can be reffered to in order to determine when to plant alyssum.

Planting Calendar for Alyssum

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

Since alyssum do well in cold you can plant them a lot earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant alyssum in New Ulm 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 alyssum and expect a good harvest is probably August. Any later than that and your alyssum may not have a chance to grow to maturity. You can get started a little bit earlier by starting your alyssum indoors.

Last Frost Date

On average the last frost is on May 15 in New Ulm. In the coldest months of winter you should expect an average low temperature of -25°F.

Just be sure to remember that USDA zone info for New Ulm is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in New Ulm you get surprised by a frost after May 15 so just be sure to be ready to cover your alyssum if you have a surprise late frost.

USDA Zone Info for New Ulm

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 New Ulm

You may be interested in your other planting guides for New Ulm.