This section is from the book "The Gardener V1", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
The above stove-plant is well-known and highly appreciated on account of it flowering from November on throughout the winter months, when its bright flower-wreaths are especially welcome. I desire just now to draw attention to it as a most suitable plant for covering the back wall of stoves, planted out, instead of being grown in pots. Of course it is best to grow in both ways; but though it is very fine in pots, it cannot for a moment be compared to those planted out and trained to wires on the wall. I have here a fine plant of Bougainvillea glabra, which covers most of the gable of the stove - said stove being a span-roofed structure - and the wall is 16 feet high, with the glass rising 7 feet above that, so that it is a pretty lofty structure. The Bougainvillea blooms gloriously here, as it gets the full sun the whole day; it was rather bare, however, in winter, when it was pruned, so in 1879 I planted a few plants of the Euphorbia, and allowed it to run up along with the Bougainvillea. The Euphorbia has reached nearly the top, and is now a perfect mass of flower; some of the spikes will measure fully 3 feet in length; the flowers, also, are much larger than when grown in the pot, and brighter in colour, and the foliage is both larger and richer-looking. Of course it is kept growing on, only partly pruned back : some of the shoots are as thick as a man's finger.
The border is about 2 feet wide, and is bounded by the pathway on the opposite side, and along and under this path runs the feed-pipes from the boiler, so that both the plants have the benefit of the heat from the pipes at their roots, which may partly account for their vigour. J. G., W.