Here are four different sources (one of which was published in Adventist Home) that touch on Christmas Trees:
1. Adventist Home, page 482.
“Shall We Have a Christmas Tree?”—God would be well pleased if on Christmas each church would have a Christmas treeon which shall be hung offerings, great and small, for these houses of worship. [Note: reference is made in this article to current building projects. As the principles set forth in this connection are applicable today, these specific references are left in the article.] Letters of inquiry have come to us asking, Shall we have a Christmas tree? Will it not be like the world? We answer, You can make it like the world if you have a disposition to do so, or you can make it as unlike the world as possible. There is no particular sin in selecting a fragrant evergreen and placing it in our churches, but the sin lies in the motive which prompts to action and the use which is made of the gifts placed upon the tree. {AH 482.1}
2. Review and Herald, December 11, 1879
We are now nearing the close of another year, and shall we not make these festal days opportunities in which to bring to God our offerings? I cannot say sacrifices, for we shall only be rendering to God that which is his already, and which he has only intrusted to us till he shall call for it. God would be well pleased if on Christmas, each church would have a Christmas tree on which shall be hung offerings, great and small, for these houses of worship. Letters of inquiry have come to us asking, Shall we have a Christmas tree? will it not be like the world? We answer, You can make it like the world if you have a disposition to do so, or you can make it as unlike the world as possible. There is no particular sin in selecting a fragrant evergreen, and placing it in our churches; but the sin lies in the motive which prompts to action, and the use which is made of the gifts placed upon the tree. {RH December 11, 1879, par. 15}
3. Review and Herald, December 26, 1882
In every church, however small, special efforts should be made to show our gratitude to God by bringing our offerings for his cause. Let those who desire a Christmas tree make its boughs fruitful with gifts for the needy, and offerings for the treasury of God. And let the children learn the blessedness of giving by bringing their little gifts to add to the offerings of their parents. {RH December 26, 1882, par. 15}
4. Review and Herald, December 9, 1884
Christmas is coming. May you all have wisdom to make it a precious season. Let the older church members unite, heart and soul, with their children in this innocent amusement and recreation, in devising ways and means to show true respect to Jesus by bringing to him gifts and offerings. Let every one remember the claims of God. His cause cannot go forward without your aid. Let the gifts you have usually bestowed upon one another be placed in the Lord’s treasury. I present before you, my brethren and sisters, an object, the European mission. In every church let your smaller offerings be placed upon your Christmas tree. Let the precious emblem, “ever green,” suggest the holy work of God and his beneficence to us; and the loving heart-work will be to save other souls who are in darkness. Let your works be in accordance with your faith. I heard Eld. Butler read a touching letter a few days since from Eld. Whitney, of Europe. The good work is going forward there, but it ought to have been done six years ago. Let not this work be hindered. Let it advance. If all, both old and young, will forego giving presents to one another, and forego the selfish outlay of means in these coming holidays, there would be in heaven a most precious record of self-denial for Christ’s sake.{RH December 9, 1884, par. 9}
5. Signs of the Times, December 8, 1887
Let your Christmas tree be dedicated to God, and let its boughs be laden with offerings for Christ. Do not give as though it were a task, doling out your donations with a niggardly hand. Good works are no drudgery. In giving to us his Son, God has poured out to us all Heaven in one gift. Let us with an overflowing heart, with gratitude and joy because of Christ’s matchless love, bring him our offerings. Teach your children by your own example the blessedness of doing for Christ. Train them to go on errands of love for him, and in all their gifts to remember the gracious Giver. {ST December 8, 1887, par. 16}