When to Plant Purple Rock Cress in Inver Grove Heights, MN

Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By referring to the USDA zone info for Inver Grove Heights you should be able to figure out when to plant purple rock cress.

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Planting Calendar for Purple Rock Cress

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

Since purple rock cress do well in cold you can plant them a lot earlier in the year than other frost tender plants.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant purple rock cress
Possibly ok, but a risky time to plant purple rock cress
Probably not a good time to plant purple rock cress

The earliest that you can plant purple rock cress in Inver Grove Heights 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 purple rock cress and expect a good harvest is probably August. Any later than that and your purple rock cress may not have a chance to really do well. Starting your purple rock cress indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Inver Grove Heights. In the coldest months of winter you should expect an average low temperature of -25°F.

Remember that USDA zone info for Inver Grove Heights is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Inver Grove Heights you get surprised by a frost after May 15 so always be ready to cover your purple rock cress if you have a late frost.

USDA Zone Info for Inver Grove Heights

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-25°F
Highest Expected Low-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Inver Grove Heights

You may be interested in your other planting guides for Inver Grove Heights.