The USDA Zone info is a great tool for gardeners to help us determine 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.

The USDA zone info for Sheffield should be reffered to in order to figure out when it's a good idea to plant alyssum.

Planting Calendar for Alyssum

Frost tolerance for alyssum:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Alyssum are very cold tolerant which means that you can start planting them much earlier than other frost tender plants.

The earliest that you can plant alyssum in Sheffield 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 alyssum and expect a good harvest is probably September. You probably don't want to wait any later than that or else your alyssum may not have a chance to fully mature. If you are starting your alyssum indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Sheffield the average date of last frost happens on April 15. It might get as low as 5°F during the coldest months of winter.

Always keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Sheffield and it changes from year to year. Since half of the time in Sheffield it frosts late in the year after April 15 be ready to cover your alyssum in the event of one of those late frosts.

USDA Zone Info for Sheffield

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°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 10°F.

Plants to Grow in Sheffield

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