This process is repeated until all holes are planted and the barrel is full of earth-except for the core, which is left empty.
From then on the care consists of keeping the soil moist by watering through the core. Occasional watering with a liquid fertilizer is a good idea.
A nail keg garden, constructed similarly, might be simpler
to start with. The center core may be omitted. Holes may be planted to hen-and-chickens or any of the many sedums. This garden will require very little watering, since these are almost drought-proof plants. Weeding, except for the top area, is a nonexistent chore.
The pyramid garden is another space-saver, usually planted to strawberries, but suitable also for herbs or compact annuals. It is much easier to keep weeded than garden row plantings. The pyramid is a terraced garden, usually with four or five planting tiers, each about six inches wide.
Commercially, pyramid gardens are made of aluminum strips and are sold knocked down. They come in at least two sizes, five and six feet in diameter. The smaller size would be best for a child, since it is quite a stretch to the center of the larger ones.
A home craftsman can easily make a wooden adaptation of the pyramid, making square box frames about six inches high, in graduated sizes. The dimensions of the garden can then be determined by the size of the child who is to tend it.
A Maypole trellis will provide a rather theatrical setting for colorful flowering vines. To make this, drive a tall pole into the ground. Its height will depend on what vines you intend to plant. Insert an eye-hook in the top of the pole. String small rope or heavy twine from this hook, running a dozen or so lines out from the top. Anchor these in the ground to small stakes set in a circle six or eight feet in diameter.
At each stake plant some kind of vine that is quick-growing and not too tall. Tall-growing nasturtiums would be effective. The lovely black-eyed Susan vine (Thunbergia alata) is a good choice, although it does need an early start. So are sweet peas if you live in an area where they do well. A couple of varieties-Cuthbertson and Burpee's new Giant Heat Resistant-succeed where others fail.
Morning glories in mixed colors could be used, too, but they need constant cutting back at the top to avoid an exuberant tangle. Other vines such as scarlet runner beans, hya-
cinth beans (Dolichos) and canary bird vine (Tropaeolum peregrinum) also would have to be kept trimmed.