The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's a good idea to determine when to plant sweet williams by referring to the USDA zone info for Clearfield.

Planting Calendar for Sweet Williams

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

Since sweet williams do well in moderate cold you can plant them a little bit earlier in the year than more sensitive plants.

The earliest that you can plant sweet williams in Clearfield 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 sweet williams and expect a good harvest is probably September. Any later than that and your sweet williams may not have a chance to fully mature. You can get started a few weeks earlier by starting your sweet williams indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Clearfield. In the coldest months of winter you can expect an average low temperature of 0°F.

Just be sure to remember that USDA zone info for Clearfield is not always accurate and the actual date of last frost will vary from year to year. Since half of the time in Clearfield there is a last frost after April 15 be ready to cover your sweet williams if you have a late frost.

USDA Zone Info for Clearfield

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Clearfield

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