This section is from the book "The Gardener's Monthly And Horticulturist V23", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
I know the Poinsetta is thought by many to be a hot-house plant, but that it will do in the greenhouse must be evident to all who have given it a trial. I think no one who has a greenhouse, should be without a few of these beautiful plants. I do not know any class of plants that will make such a gorgeous display at this time of year. I have had the best results with young plants in six or seven-inch pots. They will produce bracts from fifteen to seventeen inches in diameter, on plants about three feet high. The night temperature of the house we grow them in ranges from 45° to 50°. I am aware the Poinsetta is largely grown in sale places, but I do not think it receives the attention in private places that its beauty and usefulness warrant.