Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to determine when it's possible to plant oenothera by looking at the USDA zone info for Waterford.

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 Waterford is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant oenothera and expect a good harvest is probably October. If you wait any later than that and your oenothera may not have a chance to really do well. You can get started a little bit earlier by starting your oenothera indoors.

Last Frost Date

The average date of last frost is February 15 in Waterford. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Waterford is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Waterford you get surprised by a frost after February 15 be ready to protect your oenothera if you have a surprise late frost.

USDA Zone Info for Waterford

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Waterford

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