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.

A way of getting a good idea when it's a good idea to plant bunching onions is to examine the USDA zone info for Jamestown.

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 are barely cold tolerant which tells us that you can plant them slightly earlier than plants that are more sensitive to the cold.

The earliest that you can plant bunching onions in Jamestown 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. You can get started a few weeks earlier by starting your bunching onions indoors.

Last Frost Date

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

Since the USDA zone info for Jamestown may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Jamestown you get surprised by a frost after April 15 so always be ready to protect your bunching onions in the event of a late frost.

USDA Zone Info for Jamestown

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 Jamestown

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