Can We Get An Updated Plant Zone For Indiana?

Question

I noticed that the plant zones for Indiana are based back in 2012. And I can already say a lot has changed from them already for the plant zones in Indiana. I’m able to keep certain plants outside now like my Chinese windmill palm also known as trachycarpus fortunei outside for really most of the year. And I’m also able to keep other types of palms outside which tells me the plant zones are changing.so I wanted to see if there could be anyway possible to get an more updated plant zone for Indiana? Was even able to keep my majesty palm out for most of the year as well.

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Answer 1

You can read about the climatological data here. It is based on 30-year averages and you have the most recent zone.

https://planthardiness.ars.usda.gov/pages/about