I don't know about Lowe's signs but I went to their website and found Christmas trees.
http://www.lowes.com/lowes/lkn?action=productList&N=0&Ntk=i_indoors&Ntt=artificial+tree&category=Holidays&lks=hpb24c
GE
9 Ft. Heritage Frasier Fir Artificial Christmas Tree - Clear Lights
Item #: 209344 Model: 11998LO
They probably lied about Loews as well.
Did you get their "Holiday" flier last weekend? "Outdoor decorations" are Christmas lights, etc. "Themed holiday trees" are Christmas trees. Etc. The word "Christmas" doesn't appear anywhere in their flyer. It's studiously avoided.
I will deny my business to those who deny and profit from the celebration of Christ's birth.