Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to determine when it's the best time to plant mecardonia by referring to the USDA zone info for Oregon.

Planting Calendar for Mecardonia

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

Mecardonia are not cold tolerant which means that it's important to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant mecardonia in Oregon 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 mecardonia and expect a good harvest is probably August. If you wait any later than that and your mecardonia may not have a chance to fully mature. Starting your mecardonia indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Oregon. In the coldest months of winter you can expect an average low temperature of -20°F.

Since the USDA zone info for Oregon is just an average the actual date of last frost is different every year. Half of the time in Oregon it frosts late in the year after April 15 so make sure that you are ready to cover your mecardonia if you have a late frost.

USDA Zone Info for Oregon

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Oregon

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