We think that while you are a child you will probably not have much chance either of making rock gardens or of building walls; but you may have a bit of wall or garden that easily lends itself to rock plants, and would not do well for anything else. In some parts of England you may have a garden that is rock with a sprinkling of soil on it, and the difficulty will be to find or make places for vegetables and deep-rooted shrubs and flowers. In a garden of this kind the children are quite likely to have a patch where the rocks are showing through the soil, and where it is difficult to find pockets of earth deep enough even for Daffodils or Tulips. But there are many beautiful shallow-rooted plants you can grow in such places as these, for they will not be like the silly heap of loose stones or bricks described in the magazine article. For instance, if you put a bit of the Arenaria Balearica in such a rocky corner as this, it will find its way here and there, clothing every stone with a mossy carpet, and in spring putting out thousands of tiny white starry flowers. Then there is a charming Dwarf Veronica (_Veronica repens_), that seems content with very little soil, increases at a great rate, and has that pretty way of clothing the stones and taking their shapes. Another of our favourite common Alpines is the Campanula Cæspitosa, a small Campanula that sends up its quivering white or blue bells the whole summer through. It is so hardy and rambling, and increases so fast, that the fastidious rock gardener warns you not to let anything precious grow near it. You will have to find out for yourself which rock plants are so greedy and pushing that you get tired of their company; for this must depend on your soil and climate. In Cornwall the little Arenaria Balearica spreads so quickly that you soon tear it up by the yard, while in the North of England it seems to increase slowly. In a cold district you may be glad of things that would overrun you in a warm one. Near a town people grow whatever will best endure the soot and close air. When you are older you will have to find out which plants want lime and which granite, which peat and which sand; but we will only tell you of plants now that will grow in any ordinary good garden soil mixed with a little leaf-mould and some small stones, and we will only give you the names of plants that can be got at any good nursery garden. If you can do so, get your plants in little pots, and put them into your rockery or your wall on a showery spring day. But take care that every plant has a good deep pocket of fresh soil to feed it. PLANTS FOR A ROCK GARDEN. _Alyssum Saxatile._—This grows into a dwarf shrub in time, and is a mass of small, brilliant, yellow flowers in spring. It is very sweet, and the bees love it. It looks well near Aubrietias, or near Lithospermum Prostratum. Suitable either for a rock garden or for a loose stone wall in which you can have a deep pocket of earth for its roots.