SOUTH PORTLAND, Maine (AP) — For all the worries about inflation and the economy, Americans aren't scrimping on a centerpiece of many celebrations this holiday season: the Christmas tree.

Retailers from Home Depot and Lowes to mom and pop operations raised their prices on trees — but people are still buying them.

Some Christmas tree growers fretted over external factors — high fuel, fertilizer and labor costs — only to rediscover that holiday greenery is largely inflation-proof, even as Americans cut back on retail spending last month.

The cost of an average-size tree from the local Rotary Clu...