One of the best tools that you have as gardeners to help us estimate 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 first chance to plant doronicum in Raritan can be estimated by reviewing 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.

Doronicum do well in moderate cold which tells us that you can plant them just a bit earlier in the year than other frost tender plants.

The earliest that you can plant doronicum in Raritan 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 really do well. 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 Raritan. In the coldest months of winter you can expect an average low temperature of -5°F.

Keep in mind that USDA zone info for Raritan is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Raritan you get a frost after April 15 so just be sure to be ready to cover your doronicum if you have one of those late frosts.

USDA Zone Info for Raritan

Here is the info for USDA Zone 6b.

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

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

Plants to Grow in Raritan

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