Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Butler you can figure out when you can plant asters by referring to 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.

Since asters do well in moderate cold you can plant them just a bit earlier in the year than other frost tender plants.

The earliest that you can plant asters in Butler 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 grow to maturity. Starting your asters indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Butler the average date of last frost happens on April 15. You should expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Butler is not always accurate the actual date of last frost changes from year to year. Half of the time in Butler there is a last frost after April 15 so always be ready to protect your asters in the event of a late frost.

USDA Zone Info for Butler

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 Butler

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