This hot, dry summer — and the likelihood of even hotter, drier ones as the climate warms — has forced me to come to terms with the realities of gardening in this place: four big Norway maples on or near my 6,000 square feet; only six millimeters (about 1/4 inch) of rain from mid-June to mid-September; thin, sandy soil into which compost is instantly absorbed.

I’ve lost my inclination to struggle against these facts.

The essence of gardening is creating artificial environments — making plants grow in places they would never exist under natural conditions; tinkering with plants to change their natures; assembling plants into unlikely combinations for aesthetic purposes. That takes cleverness, imagination and energy. Doing what it takes to keep a garden going is the whole point of gardening. A garden is a place in which to dig, plant, weed, prune, edge, trim, water. And, for a few…