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 reviewing the USDA zone info for Ulysses it's a good idea to estimate when to plant iberis.

Planting Calendar for Iberis

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

Iberis tend to make it in mild cold which tells us that you can plant them a little bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant iberis in Ulysses is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant iberis and expect a good harvest is probably September. You probably don't want to wait any later than that or else your iberis may not have a chance to fully mature. Starting your iberis indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Ulysses. You should expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Ulysses is an average the actual date of last frost changes from year to year. Since half of the time in Ulysses you get surprised by a frost after April 15 be ready to cover your iberis in the event of a late frost.

USDA Zone Info for Ulysses

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Ulysses

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