The USDA Zone info is a great tool for gardeners to help us estimate 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 Pratt should be looked at to estimate when it's the best time to plant zinnia.

Planting Calendar for Zinnia

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

Since zinnia are not cold tolerant you need to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant zinnia in Pratt 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. If you wait 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 couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Pratt. You can expect an average low temperature of -5°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Pratt may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Pratt you get a frost after April 15 so make sure that you are prepared to cover your zinnia if you have a surprise late frost.

USDA Zone Info for Pratt

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 Pratt

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