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.

By referring to the USDA zone info for Owensboro you will be able to determine when it's possible to plant hardy hibiscus.

Planting Calendar for Hardy Hibiscus

Frost tolerance for hardy hibiscus:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

You can plant hardy hibiscus much earlier in the year because they are very cold tolerant.

The earliest that you can plant hardy hibiscus in Owensboro 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 hardy hibiscus and expect a good harvest is probably September. If you wait any later than that and your hardy hibiscus may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your hardy hibiscus indoors.

Last Frost Date

The average date of last frost is April 15 in Owensboro. You should expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Owensboro is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Owensboro you get surprised by a frost after April 15 so make sure that you are prepared to protect your hardy hibiscus if you have a surprise late frost.

USDA Zone Info for Owensboro

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 Owensboro

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