One of the first steps you take when you are making a decision about your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of determining when you can plant zinnia is to check out the USDA zone info for West Mifflin.

Planting Calendar for Zinnia

Frost tolerance for zinnia:	Not tolerant of frost.
When to plant:	After the last frost.

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

The earliest that you can plant zinnia in West Mifflin 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 zinnia and expect a good harvest is probably August. Any later than that and your zinnia may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your zinnia indoors.

Last Frost Date

In West Mifflin the average date of last frost happens on April 15. You should expect an average low temperature of -5°F in the coldest months of winter.

Remember that USDA zone info for West Mifflin is not always accurate and the actual date of last frost will vary from year to year. Half of the time in West Mifflin you get a frost after April 15 so be sure to be ready to protect your zinnia if you have a surprise late frost.

USDA Zone Info for West Mifflin

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in West Mifflin

You may be interested in your other planting guides for West Mifflin.