The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of estimating when you can plant rudbeckia is to check out the USDA zone info for Ironton.

Planting Calendar for Rudbeckia

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

Rudbeckia are moderately cold tolerant which means that you can plant them a little bit earlier than plants that are more sensitive to the cold.

The earliest that you can plant rudbeckia in Ironton 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 rudbeckia and expect a good harvest is probably September. If you wait any later than that and your rudbeckia may not have a chance to really do well. You can get started a couple of weeks earlier by starting your rudbeckia indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Ironton. In the coldest months of winter you can expect an average low temperature of -5°F.

Since the USDA zone info for Ironton is not always accurate the actual date of last frost changes from year to year. Since half of the time in Ironton there is a last frost after April 15 be ready to protect your rudbeckia if you have one of those late frosts.

USDA Zone Info for Ironton

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 Ironton

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