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.

By referring to the USDA zone info for Norwich it's possible to estimate when it's a good idea to plant trifolium.

Planting Calendar for Trifolium

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

Trifolium do ok in moderate cold which means that you can plant them slightly earlier than other frost tender plants.

The earliest that you can plant trifolium in Norwich 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 trifolium and expect a good harvest is probably August. You probably don't want to wait any later than that or else your trifolium may not have a chance to really do well. Starting your trifolium indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Norwich. In the coldest months of winter you can expect an average low temperature of -5°F.

Remember that USDA zone info for Norwich is just an average and the actual date of last frost changes from year to year. Half of the time in Norwich you get a frost after April 15 so make sure that you are prepared to cover your trifolium if you have one of those late frosts.

USDA Zone Info for Norwich

Here is the info for USDA Zone 6b.

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

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

Plants to Grow in Norwich

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