One of the best tools that you have as gardeners to help us determine your gardening schedule is the 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 figuring out when it's possible to plant oxalis is to examine the USDA zone info for Newberg.

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's important to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant oxalis in Newberg 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 fully mature. You can get started a few weeks earlier by starting your oxalis indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Newberg. In the coldest months of winter you should expect an average low temperature of 15°F.

Keep in mind that USDA zone info for Newberg is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in Newberg last frost occurs after March 15 be ready to cover your oxalis if you have one of those late frosts.

USDA Zone Info for Newberg

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 Newberg

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