Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Stillwater you can determine when it's the best time to plant celosia by using the USDA zone info.

Planting Calendar for Celosia

Frost tolerance for celosia:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Celosia require warm weather which tells us that you must wait until it warms up after the last frost before you can plant them.

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

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Stillwater. In the coldest months of winter you should expect an average low temperature of -25°F.

Since the USDA zone info for Stillwater may not be accurate from year to year the actual date of last frost changes from year to year. Since half of the time in Stillwater it frosts late in the year after May 15 be ready to protect your celosia in the event of a late frost.

USDA Zone Info for Stillwater

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 Stillwater

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