The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Presque Isle you can figure out when to plant oxalis by looking at the USDA zone info.

Planting Calendar for Oxalis

Frost tolerance for oxalis:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably a bad idea to plant oxalis until after the last frost has passed because they do not do well in cold weather.

The earliest that you can plant oxalis in Presque Isle 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. If you wait any later than that and your oxalis may not have a chance to grow to maturity. Starting your oxalis indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on May 15 in Presque Isle. It might get as low as -30°F during the coldest months of winter.

Since the USDA zone info for Presque Isle is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Presque Isle it frosts late in the year after May 15 so just be sure to be ready to protect your oxalis if you have one of those late frosts.

USDA Zone Info for Presque Isle

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 Presque Isle

You may be interested in your other planting guides for Presque Isle.