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 referring to the USDA zone info for Oak Brook you should be able to estimate when it's a good idea to plant baby blue eyes.

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.

You can plant baby blue eyes a little bit earlier in the year because they do well in moderate cold.

The earliest that you can plant baby blue eyes in Oak Brook 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 baby blue eyes and expect a good harvest is probably September. If you wait any later than that and your baby blue eyes may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your baby blue eyes indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Oak Brook. You should expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Oak Brook is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Oak Brook it frosts late in the year after April 15 so always be ready to cover your baby blue eyes in the event of a late frost.

USDA Zone Info for Oak Brook

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Oak Brook

You may be interested in your other planting guides for Oak Brook.