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.

It's possible to estimate when it's possible to plant heliotrope by using the USDA zone info for Clarkston.

Planting Calendar for Heliotrope

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

It's a bad idea to plant heliotrope until after all chance of frost has passed because they do not do well in cold weather.

The earliest that you can plant heliotrope in Clarkston 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 fully mature. You can get started a little bit earlier by starting your heliotrope indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Clarkston. In the coldest months of winter you can expect an average low temperature of 5°F.

Since the USDA zone info for Clarkston may not be accurate from year to year the actual date of last frost will vary from year to year. Since half of the time in Clarkston it frosts late in the year after April 15 be ready to protect your heliotrope in the event of a late frost.

USDA Zone Info for Clarkston

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°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 10°F.

Plants to Grow in Clarkston

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