The USDA Zone info is a great tool for gardeners to help us figure out 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.

By reviewing the USDA zone info for Altoona you should be able to determine when it's a good idea to plant trachelium.

Planting Calendar for Trachelium

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

Since trachelium require warm weather you have to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant trachelium in Altoona 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 trachelium and expect a good harvest is probably August. Any later than that and your trachelium may not have a chance to grow to maturity. Starting your trachelium indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost is on April 15 in Altoona. You should expect an average low temperature of -20°F in the coldest months of winter.

Since the USDA zone info for Altoona is an average the actual date of last frost will vary from year to year. Half of the time in Altoona you get surprised by a frost after April 15 so make sure that you are ready to protect your trachelium if you have one of those late frosts.

USDA Zone Info for Altoona

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Altoona

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