One of the first steps you take when you are making a decision about 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.

In Warrenville you can figure out when you can plant flower-of-an-hour by looking at the USDA zone info.

Planting Calendar for Flower-of-an-Hour

Frost tolerance for flower-of-an-hour:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Flower-of-an-Hour can survive in mild cold which means that you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant flower-of-an-hour in Warrenville is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant flower-of-an-hour and expect a good harvest is probably August. If you wait any later than that and your flower-of-an-hour may not have a chance to really do well. You can get started a few weeks earlier by starting your flower-of-an-hour indoors.

Last Frost Date

On average the last frost is on April 15 in Warrenville. In the coldest months of winter you should expect an average low temperature of -15°F.

Keep in mind that USDA zone info for Warrenville may not be accurate from year to year and the actual date of last frost changes from year to year. Half of the time in Warrenville there is a last frost after April 15 so make sure that you are prepared to cover your flower-of-an-hour in the event of a surprise late frost.

USDA Zone Info for Warrenville

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 Warrenville

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