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.

The USDA zone info for Altoona can be read to estimate when it's a good idea to plant celery.

Planting Calendar for Celery

Frost tolerance for celery:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Celery do ok in very little cold which means that you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant celery 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 celery and expect a good harvest is probably August. You probably don't want to wait any later than that or else your celery may not have a chance to really do well. You can get started a little bit earlier by starting your celery indoors.

Last Frost Date

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

Keep in mind that USDA zone info for Altoona is just an average and the actual date of last frost is different every year. Half of the time in Altoona there is a last frost after April 15 so make sure that you are prepared to protect your celery if you have a late frost.

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.