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 earliest that you can plant melampodium in Harrisburg can be estimated by using the USDA zone info.

Planting Calendar for Melampodium

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

Melampodium require warm weather which means that you have to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant melampodium in Harrisburg 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 melampodium and expect a good harvest is probably August. Any later than that and your melampodium may not have a chance to really do well. You can get started a couple of weeks earlier by starting your melampodium indoors.

Last Frost Date

In Harrisburg the average date of last frost happens on April 15. In the coldest months of winter you can expect an average low temperature of 5°F.

It's important to remember that USDA zone info for Harrisburg is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Harrisburg you get surprised by a frost after April 15 so always be ready to protect your melampodium if you have a late frost.

USDA Zone Info for Harrisburg

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 Harrisburg

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