When can I plant Alyssum in Zone 1b

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

By looking at the USDA zone info for Zone 1b you should be able to determine when it's possible to plant alyssum.


Planting Calendar for Alyssum

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

Alyssum are one of those plants that can tolerate quite a bit of cold weather which means that you can plant them much earlier than plants that are more sensitive to the cold.

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 1b is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant alyssum and expect a good harvest is probably July. If you wait any later than that and your alyssum may not have a chance to fully mature. You can get started a few weeks earlier by starting your alyssum indoors.

Last Frost Date

On average the last frost has passed is on June 15 in Zone 1b. We can expect an average low temperature of -55°F in the coldest months of winter.

Keep in mind that USDA zone info for Zone 1b may not be accurate from year to year and our actual date of last frost changes from year to year. Since half of the time in Zone 1b it frosts late in the year after June 15 be ready to protect your alyssum if we have a late frost.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-55°F
Highest Expected Low-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in our other planting guides for Zone 1b.