Do Christmas Tree Water Additives Really Work?

Every holiday season, gardeners hear claims about special additives— aspirin, soda, bleach, commercial “tree preservatives”—that supposedly keep a cut Christmas tree fresh longer. The short answer: none of them outperform plain water.

Research from the cut-flower industry has identified chemical mixtures that extend vase life for roses and carnations, but those same formulas have shown no benefit when tested on Christmas trees. The most important factor is simply keeping the stand reservoir full. A fresh-cut tree can absorb a gallon or more of water in the first 24 hours, so check the level daily and refill with plain tap water—what one horticulturist jokingly calls “dihydrogen oxide.”

Skip the home remedies and save your money. A clean stand, a fresh cut on the trunk before setup, and consistent hydration are all your tree needs to stay green and fragrant through the season.