Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Altoona you can determine when it's possible to plant armeria by checking out the USDA zone info.

Planting Calendar for Armeria

Frost tolerance for armeria:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since armeria are very cold tolerant you can plant them earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant armeria in Altoona is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant armeria and expect a good harvest is probably August. Any later than that and your armeria may not have a chance to fully mature. Starting your armeria indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Altoona the average date of last frost happens on May 15. In the coldest months of winter you should expect an average low temperature of -25°F.

Since the USDA zone info for Altoona may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Altoona you get surprised by a frost after May 15 so make sure that you are ready to cover your armeria if you have one of those late frosts.

USDA Zone Info for Altoona

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Altoona

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