The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first opportunity to plant helianthemum in Ardmore can be estimated by using the USDA zone info.

Planting Calendar for Helianthemum

Frost tolerance for helianthemum:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Helianthemum do well in moderate cold which means that you can plant them a little bit earlier than more sensitive plants.

The earliest that you can plant helianthemum in Ardmore 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 helianthemum and expect a good harvest is probably September. Any later than that and your helianthemum may not have a chance to grow to maturity. If you are starting your helianthemum indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Ardmore. In the coldest months of winter you should expect an average low temperature of 5°F.

Since the USDA zone info for Ardmore is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Ardmore you get surprised by a frost after April 15 be ready to cover your helianthemum if you have a late frost.

USDA Zone Info for Ardmore

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 Ardmore

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