Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first opportunity to plant baby blue eyes in Zone 4b should be figured out by reviewing the USDA zone info.

Planting Calendar for Baby Blue Eyes

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

Baby Blue Eyes do well in moderate cold which means that you can plant them earlier than plants that are more sensitive to the cold.

The earliest that you can plant baby blue eyes in Zone 4b 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 baby blue eyes and expect a good harvest is probably August. Any later than that and your baby blue eyes may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your baby blue eyes indoors.

Last Frost Date

In Zone 4b the average date of last frost happens on May 15. It might get as low as -25°F during the coldest months of winter.

Remember that USDA zone info for Zone 4b is not always accurate and the actual date of last frost is different every year. Half of the time in Zone 4b you get surprised by a frost after May 15 so make sure that you are ready to protect your baby blue eyes in the event of a surprise late frost.

USDA Zone Info for Zone 4b

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 Zone 4b

You may be interested in your other planting guides for Zone 4b.