One of the first steps you take when you are determining 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 getting a good idea when it's the best time to plant oxalis is to consult the USDA zone info for Lancaster.

Planting Calendar for Oxalis

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

Since oxalis require warm weather it is necessary to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant oxalis in Lancaster 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 oxalis and expect a good harvest is probably August. You probably don't want to wait any later than that or else your oxalis may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your oxalis indoors.

Last Frost Date

On average the last frost has passed is on March 15 in Lancaster. In the coldest months of winter you should expect an average low temperature of 15°F.

Always keep in mind that USDA zone info for Lancaster is not always accurate and the actual date of last frost changes from year to year. Since half of the time in Lancaster last frost occurs after March 15 be ready to cover your oxalis if you have one of those late frosts.

USDA Zone Info for Lancaster

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°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 20°F.

Plants to Grow in Lancaster

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