The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to determine when to plant santolina by reviewing the USDA zone info for Duluth.

Planting Calendar for Santolina

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

Since santolina do well in cold you can plant them a lot earlier in the year than other plants that might not handle the cold.

The earliest that you can plant santolina in Duluth is March. However, you really should wait until April if you don't want to take any chances.

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

Last Frost Date

The average date of last frost is May 15 in Duluth. In the coldest months of winter you can expect an average low temperature of -30°F.

Since the USDA zone info for Duluth is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Duluth it frosts late in the year after May 15 so be sure to be ready to protect your santolina in the event of a late frost.

USDA Zone Info for Duluth

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°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 -25°F.

Plants to Grow in Duluth

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