One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of determining when it's a good idea to plant bunching onions is to look at the USDA zone info for Gunnison.

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 do ok in very little cold which means that you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant bunching onions in Gunnison is April. However, you really should wait until May 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. You probably don't want to wait any later than that or else your bunching onions may not have a chance to really do well. You can get started a little bit earlier by starting your bunching onions indoors.

Last Frost Date

On average all chance of frost has passed is on May 15 in Gunnison. You should expect an average low temperature of -30°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Gunnison is not always accurate and the actual date of last frost is different every year. Half of the time in Gunnison it frosts late in the year after May 15 so always be ready to cover your bunching onions if you have one of those late frosts.

USDA Zone Info for Gunnison

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Gunnison

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