The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Mapleton you can determine when it's the best time to plant pearl onions by looking at the USDA zone info.

Planting Calendar for Pearl onions

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

You can plant pearl onions slightly earlier in the year because they are barely cold tolerant.

The earliest that you can plant pearl onions in Mapleton 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 pearl onions and expect a good harvest is probably August. Any later than that and your pearl onions may not have a chance to fully mature. If you are starting your pearl onions indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Mapleton. You can expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Mapleton is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Mapleton last frost occurs after April 15 so be sure to be ready to protect your pearl onions if you have a surprise late frost.

USDA Zone Info for Mapleton

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Mapleton

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