This section is from the book "The Gardener's Monthly And Horticulturist V26", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
What to do with pot plants in the summer is often a question. The great majority of plants do much better in the open air than under glass. It is found by experience that many do much better when taken wholly out of the pots, and set in the open ground. But it requires some judgment to select those that will stand such treatment. Those which come up with matted roots do excellently well; but if the plant be of a kind which has but a few wiry roots, they wither so much when lifted in the fall, that it is better to keep them wholly in pots. The Azalea does very well turned out, and even the Camellia does very well, if care be taken to keep down the red spider which works on them badly if the plant be set in a sunny place. Almost all soft wooded plants do very well indeed. Succulents like aloes, cactuses, and century plants, do very much better when set out in the open ground; and this is often a great advantage, as the huge tubs these plants are often kept in all summer are dreadfully troublesome things for people to handle. When only the plant is taken out of the tub, and the plant lifted to set in the tub, it is much pleasanter work, and then these succulents can be so arranged that they make pretty effects in the open air, and so do collections of other plants, for that matter.
On many grounds, the large bed in which greenhouse plants are set out to board during the summer is among the chief ornamental features of the ground. Those plants-which it is desirable to keep in pots may be set out where they can have the pots partially plunged in sand, tan, or coal ashes, and these may be arranged in a sort of flower-bed fashion, that will look neat. In our climate the summer heat is so great that it is found these summer pot plants do very well under the shade of trees, or on the north side of a wall or fence where they will get a little protection from the all day sun. Basket plants all do well suspended under trees or other shady places, provided they can get a soaking of water at least once a week.
What we have written of greenhouse plants is of course equally applicable to plants from windows or other places in dwelling houses.