Cut 5-6ft Nordmanns have been offered for £9.99 plus VAT. Thousands of the German-grown have been sold so far and have proved to be very popular with JTF members, said senior buyer Gerrard Smith.
He said: "Some great learnings gathered. Popular with store colleagues and members alike and something that we look to build upon for 2015."
Previously Aldi was claiming the cheapest retail full-size tree price, at £19.99.
B&Q reduced Nordmanns at 150-200cm by £10 to £24.99 from 13 December.