:“However, in small [[flower garden]]s and '''shrubberies''', the latter has to be adopted. In such places, tall growing kinds should never be introduced, unless merely as a screen from some disagreeable object, for they crowd and confuse the whole. The dwarf and more bushy sorts should be placed nearest to the eye, in order that they may conceal the naked stems of the others. Generally when shrubs are planted, they are small; therefore, to have a good effect from the beginning, they should be planted closer than they are intended to stand. When they have grown a few years, and interfere with each other, they can be lifted, and such as have died, or become sickly, replaced, and the remainder can be planted in some other direction. Keep them always distinct, one from another, in order that they may be the better shown off. But, if it is not desired that they should be thicker planted than it is intended to let them remain, the small growing kinds may be six or eight feet apart; the larger, or taller sorts, ten to twenty feet, according to the condition of the soil.
:“Thick masses of '''shrubbery''', called [[thicket]]s, are sometimes wanted. In these there should be plenty of evergreens. A mass of deciduous shrubs has no imposing effect during winter.”
Changes - History of Early American Landscape Design