One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Gardiner you can estimate when it's possible to plant alyssum by checking out 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.

Alyssum are very cold tolerant which means that you can plant them much earlier than other plants that might not handle the cold.

The earliest that you can plant alyssum in Gardiner 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 few weeks earlier.

Last Frost Date

In Gardiner the average date of last frost happens on April 15. It might get as low as -20°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Gardiner is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in Gardiner 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 Gardiner

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

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

Plants to Grow in Gardiner

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