Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By looking at the USDA zone info for Lisle it's possible to figure out when you can plant firebush.

Planting Calendar for Firebush

Frost tolerance for firebush:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since firebush do not do well in cold weather you have to wait until after the last frost before you can plant them.

The earliest that you can plant firebush in Lisle is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant firebush and expect a good harvest is probably August. Any later than that and your firebush may not have a chance to fully mature. If you are starting your firebush indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in Lisle. It might get as low as -15°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Lisle is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Lisle it frosts late in the year after April 15 so make sure that you are ready to protect your firebush if you have a late frost.

USDA Zone Info for Lisle

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 Lisle

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