One of the first steps you take when you are figuring out 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.

A common way of getting a good idea when to plant alternaria is to look at the USDA zone info for Centralia.

Planting Calendar for Alternaria

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

Alternaria require warm weather which means that you must wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant alternaria in Centralia 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 alternaria and expect a good harvest is probably August. If you wait any later than that and your alternaria may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your alternaria indoors.

Last Frost Date

The average date of last frost is March 15 in Centralia. You can expect an average low temperature of 15°F in the coldest months of winter.

Always keep in mind that USDA zone info for Centralia is an average and the actual date of last frost will vary from year to year. Since half of the time in Centralia there is a last frost after March 15 be ready to cover your alternaria in the event of a surprise late frost.

USDA Zone Info for Centralia

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

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

Plants to Grow in Centralia

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