This section is from the book "Manual Of Gardening", by L. H. Bailey. Also available from Amazon: Manual of Gardening.
What kinds of shrubs and flowers to plant is a wholly secondary and largely a personal consideration. The main plantings are made up of hardy and vigorous species; then the things that you like are added. There is endless choice in the species, but the arrangement or disposition of the plants is far more important than the kinds; and the foliage and form of the plant are usually of more importance than its bloom.
The appreciation of foliage effects in the landscape is a higher type of feeling than the desire for mere color. Flowers are transitory, but foliage and plant forms are abiding. The common roses have very little value for landscape planting because the foliage and habit of the rose-bush axe not attractive, the leaves are inveterately attacked by bugs, and the blossoms are fleeting. Some of the wild roses and the Japanese Rosa rugosa, however, have distinct merit for mass effects.
Even the common flowers, as marigold, zinnias, and gaillardias, are interesting as plant-forms long before they come into bloom. To many persons the most satisfying epoch is the garden is that preceding the bloom, for the habits and stature of the plants are then unobscured. The early stages of lilies, daffodils, and all perennials are most interesting; and one never appreciates a garden until he realizes that this is bo.
Now let the reader, with these suggestions in mind, observe for one week the plant-forms in the humble herbs that he meets, whether these herbs are strong garden plants or the striking sculpturing of mulleins, burdocks, and jimson-weed. Figures 27 to 31 will be suggestive.
27. The plant-form in a perennial salvia.
28. Funkta, or day-lily. Where lies the chief interest, - in the plant-form or in the bloom?
Wild bushes are nearly always attractive in form and habit when planted in borders and groups in appearance under cultivation because given a better chance to grow. In wild nature there is such fierce struggle for existence that plants usually grow to few or single stems, and they are sparse and scraggly in form; but once given all the room they want and a good soil, they become luxurious, full, and comely. In most home grounds in the country the body of the planting may be very effectively composed of bushes taken from the adjacent woods and fields. The masses may then be enlivened by the addition here and there of cultivated bushes, and the planting of flowers and herbs about the borders. It is not essential that one know the names of these wild bushes, although a knowledge of their botanical kinships will add greatly to the pleasure of growing them. Neither will they look common when , transferred to the lawn. There are not many persons who know even the commonest wild bushes intimately, and the things change so much in looks when removed to rich ground that few home-makers recognize them.
29. A large-leaved nicotiana.
30. The awkward century plant that has been laboriously car-ried over winter year by year in the cellar: compare with other plants here shown as to its value aa a lawn subject.
31. Making a picture with rhubarb.
 
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