One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first chance to plant scaevola in Altoona can be determined by referring to the USDA zone info.

Planting Calendar for Scaevola

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

It's probably a bad idea to plant scaevola until after the last frost because they do not do well in cold weather.

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

The last month that you can plant scaevola and expect a good harvest is probably August. You probably don't want to wait any later than that or else your scaevola may not have a chance to grow to maturity. Starting your scaevola indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

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

Since the USDA zone info for Altoona may not be accurate from year to year 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 May 15 so just be sure to be ready to cover your scaevola if you have a late frost.

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.