Fall is the most underrated season on a property. It looks like tidying up and it is mostly next year's groundwork.
It runs on two clocks at once. One is counting down to the first hard freeze and sets the work that has to be finished before the ground closes. The other is running ahead to next spring, and covers the work that is simply better done now.
On the deadline clock, sprinkler blowouts have to happen before the ground freezes hard — water left in a line does not crack the pipe, it shatters it, and a system that freezes with water in it is a repair bill in April rather than a service call in October. That date moves every year and it is not generous, so we schedule by elevation and the higher properties go first. Fall cleanups and aeration are on the same clock for a gentler reason: the lawn needs enough warmth left in the soil to recover and fill in before it goes dormant.
On the ahead clock, fall is the best planting season here, which surprises people. A tree or shrub put in during September or October spends the autumn establishing roots into ground that is still warm, with no heat to fight and short days asking very little of the top of the plant. By next summer it has a root system a spring planting is still building. The same plant put in during May spends its first July surviving rather than growing. Hardscape runs well in fall too — patios, walls and rock work are easier in cool weather than in August, and they are not competing with the whole valley's install season.
Two things belong here that are easy to skip. A deep soak of every evergreen before the ground freezes is the single most useful thing anybody does for them, because an evergreen keeps losing water through its foliage all winter and cannot replace it from frozen ground — that is what browns them, not the cold. And lighting makes the most sense to talk about now, for the obvious reason: the evenings are getting shorter and the difference it makes is suddenly visible. Holiday installs are booked in the same stretch.
One thing worth not doing. A thorough autumn tidy removes most of what a yard has to look at in January — standing grasses, seed heads, held fruit, red stems. If the January view matters to you, say so before the cleanup rather than after.
