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When to Plant Santolina in Iron Mountain, MI

One of the first steps you take when you are estimating 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.

In Iron Mountain you can figure out when you can plant santolina by reviewing the USDA zone info.


Planting Calendar for Santolina

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

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

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

The earliest that you can plant santolina in Iron Mountain 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. Any later than that and your santolina may not have a chance to grow to maturity. If you are starting your santolina indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Iron Mountain. It might get as low as -30°F during the coldest months of winter.

It's important to remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Iron Mountain and it can change quite a bit from year to year. Since half of the time in Iron Mountain you get surprised by a frost after May 15 be ready to cover your santolina in the event of a late frost.

USDA Zone Info for Iron Mountain

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 Iron Mountain

You may be interested in your other planting guides for Iron Mountain.