Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of getting a good idea when it's possible to plant alyssum is to use the USDA zone info for Hewitt.

Planting Calendar for Alyssum

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

Alyssum do well in cold weather which tells us that you can plant them a lot earlier in the year than other frost tender plants.

The earliest that you can plant alyssum in Hewitt 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. If you wait any later than that and your alyssum may not have a chance to fully mature. You can get started a little bit earlier by starting your alyssum indoors.

Last Frost Date

On average all chance of frost has passed is on March 15 in Hewitt. In the coldest months of winter you should expect an average low temperature of 15°F.

Since the USDA zone info for Hewitt is just an average the actual date of last frost changes from year to year. Half of the time in Hewitt there is a last frost after March 15 so make sure that you are ready to cover your alyssum in the event of a late frost.

USDA Zone Info for Hewitt

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Hewitt

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