One of the best tools that you have as gardeners to help us figure out 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 making a decision about when it's possible to plant bishop's weed is to look at the USDA zone info for Kittanning.

Planting Calendar for Bishop's Weed

Frost tolerance for bishop's weed:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since bishop's weed are very cold tolerant you can plant them earlier in the year than other plants that might not handle the cold.

The earliest that you can plant bishop's weed in Kittanning 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 bishop's weed and expect a good harvest is probably September. Any later than that and your bishop's weed may not have a chance to really do well. You can get started a few weeks earlier by starting your bishop's weed indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Kittanning. You should expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Kittanning is just an average the actual date of last frost will vary from year to year. Half of the time in Kittanning there is a last frost after April 15 so always be ready to protect your bishop's weed if you have one of those late frosts.

USDA Zone Info for Kittanning

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 Kittanning

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