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.

By looking at the USDA zone info for Douglas it's possible to estimate when it's a good idea to plant lenten rose.

Planting Calendar for Lenten Rose

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

Lenten Rose do well in moderate cold which tells us that you can plant them earlier than other frost tender plants.

The earliest that you can plant lenten rose in Douglas is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant lenten rose and expect a good harvest is probably August. Any later than that and your lenten rose may not have a chance to fully mature. You can get started a few weeks earlier by starting your lenten rose indoors.

Last Frost Date

On average all chance of frost has passed is on May 15 in Douglas. In the coldest months of winter you can expect an average low temperature of -25°F.

Remember that USDA zone info for Douglas may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Douglas it frosts late in the year after May 15 so be sure to be ready to cover your lenten rose if you have a surprise late frost.

USDA Zone Info for Douglas

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°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 -20°F.

Plants to Grow in Douglas

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