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

In Osawatomie you can determine when it's possible to plant asters by checking out the USDA zone info.

Planting Calendar for Asters

Frost tolerance for asters:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant asters a little earlier in the year because they do well in moderate cold.

The earliest that you can plant asters in Osawatomie is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant asters and expect a good harvest is probably September. Any later than that and your asters may not have a chance to really do well. Starting your asters 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 Osawatomie. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Osawatomie is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Osawatomie last frost occurs after April 15 so always be ready to cover your asters if you have a surprise late frost.

USDA Zone Info for Osawatomie

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Osawatomie

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