The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to estimate when you can plant hypericum by looking at the USDA zone info for Waterbury.

Planting Calendar for Hypericum

Frost tolerance for hypericum:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Hypericum can survive in mild cold which means that you can plant them a bit earlier in the year than other frost tender plants.

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

The last month that you can plant hypericum and expect a good harvest is probably August. Any later than that and your hypericum may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your hypericum indoors.

Last Frost Date

The average date of last frost is April 15 in Waterbury. In the coldest months of winter you can expect an average low temperature of -10°F.

Keep in mind that USDA zone info for Waterbury is an average and the actual date of last frost will vary from year to year. Half of the time in Waterbury you get surprised by a frost after April 15 so make sure that you are prepared to cover your hypericum if you have a late frost.

USDA Zone Info for Waterbury

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 Waterbury

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