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.

It's possible to determine when it's a good idea to plant oxalis by reviewing the USDA zone info for Litchfield.

Planting Calendar for Oxalis

Frost tolerance for oxalis:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since oxalis are not cold tolerant you need to wait until after the last frost before you can plant them.

The earliest that you can plant oxalis in Litchfield is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant oxalis and expect a good harvest is probably August. Any later than that and your oxalis may not have a chance to fully mature. You can get started a little bit earlier by starting your oxalis indoors.

Last Frost Date

The average date of last frost is May 15 in Litchfield. It might get as low as -25°F during the coldest months of winter.

Since the USDA zone info for Litchfield 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 Litchfield last frost occurs after May 15 so just be sure to be ready to protect your oxalis in the event of a surprise late frost.

USDA Zone Info for Litchfield

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Litchfield

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