One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to determine when it's possible to plant alternanthera by checking out the USDA zone info for Havre De Grace.

Planting Calendar for Alternanthera

Frost tolerance for alternanthera:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's a bad idea to plant alternanthera until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant alternanthera in Havre De Grace 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 alternanthera and expect a good harvest is probably August. If you wait any later than that and your alternanthera may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your alternanthera indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Havre De Grace. You can expect an average low temperature of 0°F in the coldest months of winter.

Always keep in mind that USDA zone info for Havre De Grace is just an average and the actual date of last frost is different every year. Half of the time in Havre De Grace it frosts late in the year after April 15 so be sure to be ready to protect your alternanthera in the event of a late frost.

USDA Zone Info for Havre De Grace

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 Havre De Grace

You may be interested in your other planting guides for Havre De Grace.