One of the best tools that you have as gardeners to help us figure out 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.

The earliest that you can plant oenothera in Wentzville should be figured out by checking out the USDA zone info.

Planting Calendar for Oenothera

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

Oenothera do ok in mild cold which means that you can plant them a little earlier in the year than other frost tender plants.

The earliest that you can plant oenothera in Wentzville 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. You probably don't want to wait any later than that or else your oenothera may not have a chance to grow to maturity. If you are starting your oenothera indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in Wentzville. You should expect an average low temperature of -10°F in the coldest months of winter.

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

USDA Zone Info for Wentzville

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 Wentzville

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