One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to determine when to plant bunching onions by reviewing the USDA zone info for Kewanee.

Planting Calendar for Bunching Onions

Frost tolerance for bunching onions:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Bunching Onions can survive in very little cold which means that you can plant them slightly earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant bunching onions in Kewanee 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 bunching onions and expect a good harvest is probably August. If you wait any later than that and your bunching onions may not have a chance to really do well. Starting your bunching onions 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 Kewanee. In the coldest months of winter you can expect an average low temperature of -15°F.

Since the USDA zone info for Kewanee is not always accurate the actual date of last frost will vary from year to year. Half of the time in Kewanee you get surprised by a frost after April 15 so make sure that you are ready to protect your bunching onions in the event of a surprise late frost.

USDA Zone Info for Kewanee

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 Kewanee

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