One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You can determine when it's the best time to plant alyssum in Imperial by reviewing the USDA zone info.

Planting Calendar for Alyssum

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

Since alyssum are one of those plants that can tolerate quite a bit of cold weather you can plant them quite a bit earlier in the year than other frost tender plants.

The earliest that you can plant alyssum in Imperial is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant alyssum and expect a good harvest is probably October. You probably don't want to wait any later than that or else your alyssum may not have a chance to really do well. 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 January 31 in Imperial. It might get as low as 30°F during the coldest months of winter.

Always keep in mind that USDA zone info for Imperial may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Imperial it frosts late in the year after January 31 so make sure that you are prepared to protect your alyssum in the event of a surprise late frost.

USDA Zone Info for Imperial

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Imperial

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