All the beds intended for bulbs and half-hardy plants should be particularly well drained; and the best way of doing this is, to dig out the soil to the depth of two feet or more, and then to put in a layer of brick-bats and other rubbish, to the depth of nine inches or a foot. On this should be placed a layer of rich marly soil, in which the bulbs should be planted. Dahlias, hollyhocks, and other tall-growing, showy-flowered plants, may have similar beds prepared for them, but the soil should be made very rich by the addition of the remains of an old hotbed, or some other kind of half-rotten animal manure. You will observe, that when I give directions for planting the beds in any of the plans I send you, I merely say what may be done, and not what is absolutely necessary. Indeed, it will be better for you to vary the flowers as much as possible, according to your own taste, provided you take care that the plants are, as nearly as you can contrive it, of the same height, or that they rise gradually, and that you contrast the colours well. The rule in the latter case is, always to put one of the primitive colours (red, blue, or yellow) next another of these colours, or some colour compounded of the other two; using white wherever you cannot find any handsome plants of a colour that will suit the bed you want them for. Thus, for example, if you plant one bed with red, you may plant the next with blue, yellow, green, hair-brown, or white, but never with any shade of purple, as red enters into the composition of that colour; nor with any shade of reddish brown: purple, indeed, must always be next yellow, hair-brown, or white, but never next blue, red-brown, or red. Orange will not look well near yellow or red; and lilac must not approach blue or pink. A little practice will do more than any lengthened details; generally speaking, you may take the same taste to guide you in arranging the colours of the flowers in your parterre, that you use in choosing the colours of your dresses; and if you are in any doubt, you have only to colour the beds in the plan, and see how they look; or to stick coloured wafers on a piece of paper for the same purpose.