One of the best tools that you have as gardeners to help us determine your gardening schedule is the 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 determine when it's the best time to plant heliotrope by checking out the USDA zone info for Erwin.

Planting Calendar for Heliotrope

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

Since heliotrope are not cold tolerant it's important to wait until after the last frost before you can plant them.

The earliest that you can plant heliotrope in Erwin 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. You probably don't want to wait any later than that or else your heliotrope may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your heliotrope indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Erwin. In the coldest months of winter you can expect an average low temperature of 0°F.

It's important to remember that USDA zone info for Erwin may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Erwin you get surprised by a frost after April 15 so be sure to be ready to cover your heliotrope in the event of one of those late frosts.

USDA Zone Info for Erwin

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Erwin

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