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

The USDA zone info for Monroe can be reffered to in order to estimate when it's the best time to plant oenothera.

Planting Calendar for Oenothera

Frost tolerance for oenothera:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since oenothera are moderately cold tolerant you can plant them a little earlier in the year than other frost tender plants.

The earliest that you can plant oenothera in Monroe is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant oenothera and expect a good harvest is probably September. If you wait any later than that and your oenothera may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your oenothera indoors.

Last Frost Date

On average the last frost is on April 15 in Monroe. It might get as low as -10°F during the coldest months of winter.

Always keep in mind that USDA zone info for Monroe 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 Monroe you get surprised by a frost after April 15 be ready to cover your oenothera in the event of a late frost.

USDA Zone Info for Monroe

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Monroe

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