When to Plant Alyssum in Zone 11b

One of the first steps you take when you are making a decision about your gardening schedule is find your 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.

By checking out the USDA zone info for Zone 11b you will be able to figure out when you can plant alyssum.


Planting Calendar for Alyssum

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

You can plant alyssum quite a bit earlier in the year because they are one of those plants that can tolerate quite a bit of cold weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant alyssum
Possibly ok, but a risky time to plant alyssum
Probably not a good time to plant alyssum

The earliest that you can plant alyssum in Zone 11b 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 November. If you wait any later than that and your alyssum may not have a chance to fully mature. Starting your alyssum indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Zone 11b it never frosts. You can expect an average low temperature of 45°F in the coldest months of winter.

It's important to remember that USDA zone info for Zone 11b is just an average and the actual date of last frost can change quite a bit from year to year. Since it never frosts in Zone 11b you do not have to be ready to cover your alyssum in the event of one of those late frosts.

USDA Zone Info for Zone 11b

Here is the info for USDA Zone 11b.

Average Date of Last Frost (spring)Never
Average Date of First Frost (fall)Never
Lowest Expected Low45°F
Highest Expected Low50°F

This means that on a really cold year, the coldest it will get is 45°F. On most years you should be prepared to experience lows near 50°F.

Plants to Grow in Zone 11b

You may be interested in your other planting guides for Zone 11b.