One of the first steps you take when you are estimating your gardening schedule is find your 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.

The USDA zone info for Macomb can be looked at to determine when it's a good idea to plant rudbeckia.

Planting Calendar for Rudbeckia

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

Since rudbeckia are moderately cold tolerant you can plant them a little earlier in the year than other frost tender plants.

The earliest that you can plant rudbeckia in Macomb 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 Macomb. In the coldest months of winter you should expect an average low temperature of -15°F.

Just be sure to remember that USDA zone info for Macomb may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Macomb you get a frost after April 15 so just be sure to be ready to protect your rudbeckia in the event of a late frost.

USDA Zone Info for Macomb

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Macomb

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