Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of getting a good idea when it's a good idea to plant heliotrope is to look at the USDA zone info for College Park.

Planting Calendar for Heliotrope

Frost tolerance for heliotrope:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably a bad idea to plant heliotrope until after the last frost when the weather gets warmer because they do not do well in cold weather.

The earliest that you can plant heliotrope in College Park 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

The average date of last frost is April 15 in College Park. You can expect an average low temperature of 0°F in the coldest months of winter.

Since the USDA zone info for College Park is not always accurate the actual date of last frost is different every year. Half of the time in College Park it frosts late in the year after April 15 so make sure that you are ready to protect your heliotrope in the event of a late frost.

USDA Zone Info for College Park

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 College Park

You may be interested in your other planting guides for College Park.