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.

A common way of figuring out when you can plant zinnia is to use the USDA zone info for Aberdeen.

Planting Calendar for Zinnia

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

You should not plant zinnia until after all chance of frost has passed because they require warm weather.

The earliest that you can plant zinnia in Aberdeen 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 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. Starting your zinnia indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Aberdeen. It might get as low as -25°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Aberdeen is just an average and the actual date of last frost changes from year to year. Since half of the time in Aberdeen it frosts late in the year after May 15 be ready to cover your zinnia in the event of a late frost.

USDA Zone Info for Aberdeen

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 Aberdeen

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