Before planting it is a good idea to find your USDA Zone info to figure out 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 the best time to plant doronicum by looking at the USDA zone info for Mount Vernon.

Planting Calendar for Doronicum

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

Doronicum are moderately cold tolerant which means that you can plant them earlier than other plants that might not handle the cold.

The earliest that you can plant doronicum in Mount Vernon 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 doronicum and expect a good harvest is probably September. Any later than that and your doronicum may not have a chance to fully mature. You can get started a few weeks earlier by starting your doronicum indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Mount Vernon. In the coldest months of winter you should expect an average low temperature of 0°F.

Since the USDA zone info for Mount Vernon is just an average the actual date of last frost is different every year. Half of the time in Mount Vernon last frost occurs after April 15 so make sure that you are ready to protect your doronicum if you have a late frost.

USDA Zone Info for Mount Vernon

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Mount Vernon

You may be interested in your other planting guides for Mount Vernon.