Potential freshness warning signs to look for in a Christmas tree is how vibrant the green needles are and how easy it is for the needles to be plucked from the tree.
This is a common Christmas tree safety tip that most are aware of, but it can't be stressed enough. Always make sure your tree base has plenty of water to prevent your tree from drying out. A dry tree is more likely to catch on fire.
Whether they're candles, heat vents or fireplaces, your tree should be far away from anything that could dry it out or cause a fire.
Per the ACTA, "Make sure all your indoor and outdoor Christmas lights have been tested in a lab by the UL or ETL/ITSNA for safety, and throw out any damaged lights."
Never leave your Christmas tree on overnight. This could lead to excessively drying out your tree, which could lead to a fire.
Hopefully, you'll never have to deal with a Christmas tree fire, but it never hurts to err on the side of caution and keep a fire extinguisher nearby just in case.