Sustainable Landscapes: A California Calendar
A month-by-month working calendar for maintaining a low-water, low-input California landscape — the version I give to homeowners, HOAs, and public grounds crews.
Kyle D. Peczkowski
Board Certified Master Arborist & Urban Forester
Every sustainable landscape I've seen fail has failed for the same reason: it was maintained against a Mediterranean climate instead of with it. The plants were right. The maintenance calendar was wrong.
California's seasons run wet and cool from November through March, then dry and warm from April through October. A landscape calendar borrowed from the Midwest or the East Coast — prune in early spring, fertilize in May, water all summer — fights this rhythm every month of the year. Eventually, it loses.
January and February: Plant and prune.
Winter is the season for planting and structural pruning. The soil is soft, roots are ready to grow, and the rains handle most of the establishment watering. Plant native species, move shrubs, and prune deciduous fruit trees while they're dormant.
March and April: Mulch.
Weeds are getting taller and some grasses might already go to head, the soil is still moist, and a three inch layer of coarse arborist chips captures the last of the winter moisture while suppressing a second flush of summer weed growth. No other maintenance task delivers a bigger return for the effort.
May through September: Leave established plants alone.
Water deeply and infrequently. Established native plants often need irrigation only every two to four weeks; vegetable gardens usually need it weekly. Deep soakings encourage deep roots. Frequent, shallow watering does the opposite.
Skip the fertilizer. Skip structural pruning. Deadhead if you enjoy it, or don't.
October and November: Reset.
Cut back summer dormant natives, refresh the mulch, and make next winter's planting list. If the rains came early fall by a warming period. This is your best time to catch the weed seeds before they establish further.
Prune the oaks.
Prune the oaks.
Prune the oaks.
December: Start transplanting or reseeding areas. Watch for the first weed seeds to germinate. Now is the time to spot treat them or scuffle hoe out the weeds at cotyleton stage.
Sharpen the pruners. Oil the loppers. Service the mower. Read a book when the rains fall.
The landscape doesn't need much from you this month, and pretending it does is how expensive mistakes get made.
A calendar is a modest document. But in California, most arguments about sustainable landscapes are really arguments about timing. A one page month by month calendar is worth more to a landscape maintenance manager than a plant list twice as long, because even the right plants will struggle if they're cared for on the wrong schedule.