One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of determining when it's the best time to plant heliotrope is to look at the USDA zone info for Bowling Green.

Planting Calendar for Heliotrope

Frost tolerance for heliotrope:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since heliotrope require warm weather it is necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant heliotrope in Bowling Green 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 heliotrope and expect a good harvest is probably August. Any later than that and your heliotrope may not have a chance to grow to maturity. You can get started a little bit earlier by starting your heliotrope indoors.

Last Frost Date

In Bowling Green the average date of last frost happens on April 15. You should expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Bowling Green may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Bowling Green last frost occurs after April 15 so make sure that you are ready to cover your heliotrope if you have a late frost.

USDA Zone Info for Bowling Green

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 Bowling Green

You may be interested in your other planting guides for Bowling Green.