Trees must be scotch pine, balsam fir or fraser fir.
From the kentucky.com
If you have a scotch pine, a balsam fir or a Fraser fir that needs to be removed from your property, consider donating it to be used as one of the city's community Christmas trees.
From the kentucky.com
They practice jazz squares in dance lessons designed to make them appear light on their feet, and they are briefed on the differences between a scotch pine and a fraser fir Christmas tree.