One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Grafton you can determine when it's the best time to plant doronicum by checking out the USDA zone info.

Planting Calendar for Doronicum

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

You can plant doronicum a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant doronicum in Grafton 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. If you wait 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 has passed is on April 15 in Grafton. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Grafton is just an average the actual date of last frost will vary from year to year. Half of the time in Grafton you get a frost after April 15 so make sure that you are ready to cover your doronicum if you have one of those late frosts.

USDA Zone Info for Grafton

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 Grafton

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