California Sagebrush

Year-round

California sagebrush is native to the coastal sage scrub that historically covered much of the Los Angeles basin, and it is one of the defining shrubs of that plant community. It is grown for its silvery, aromatic foliage and for the wildlife it supports, including native bees, dozens of moth species, and birds like the California gnatcatcher and quail, more than for a showy flower display.

• Give it full sun and fast to medium draining soil. It tolerates both sandy and clay ground.
• Once established, it needs very little water, at most once a month during the dry season, and many plants go without any supplemental water at all.
• Expect a mounding, rounded shrub that typically stays in the 3 to 5 foot range in a home garden, though it can grow larger in the wild.
• A light pruning once a year keeps it compact and prevents the sprawling, woody look it can develop if left alone.

Fall

Fall is the turning point for California sagebrush. The first rains cue it to flush new feathery growth and put out its cream to yellow flower clusters, which typically run through fall.

• Fall is the best season to plant new California sagebrush. Cooler temperatures and coming rains reduce transplant stress and the amount of supplemental watering needed.
• This is a good window for the yearly shaping prune, cutting back leggy growth once summer dieback is visible.
• Watch for a burst of new gray-green foliage once the first real rain falls.
• Established plants generally do not need supplemental water once fall rains begin in a normal year.

Winter

Winter is the wet season in the Los Angeles area's Mediterranean climate, and California sagebrush is in its most active growth period, using the rain to rebuild the foliage it dropped over summer.

• Established plants typically need no supplemental water during a normal rain year. Let the winter rains do the work.
• If winter turns dry, an occasional deep watering helps, but avoid frequent shallow watering.
• New fall plantings benefit from a layer of mulch to hold moisture between rains.
• The shrub should look its fullest and greenest this time of year, a real contrast to its sparser summer appearance.

Spring

Spring is California sagebrush's most active growth period, when it pushes out the long, feathery gray-green leaves it is known for while rain is still available.

• Fall and winter are generally the best seasons to plant California natives, but a spring nursery planting still works if you water deeply and regularly through the first season.
• Expect fast growth now. This is the plant's most vigorous stretch of the year.
• Small cream to yellow flower clusters may start appearing in spring, though the plant is grown mainly for foliage and scent rather than bloom.
• Hold off on heavy pruning now. Save shaping for after the fall bloom if the plant needs it.

Summer

Summer is the hardest test of this plant's drought adaptation, and also the season it is built for. As the dry season deepens, California sagebrush drops its long spring leaves and grows smaller, tougher ones instead, a drought response called drought-deciduous growth.

• Established plants can often go the entire summer without supplemental water. A deep soak once a month at most is enough if you want to water at all.
• Expect the plant to look sparse, grayish, or even a little dead as leaves drop and growth slows in the hottest, driest stretch. That is the plant conserving water, not dying.
• Avoid letting irrigation meant for thirstier plants nearby land on sagebrush roots. Overwatering in summer is a bigger risk to this plant than underwatering.
• New transplants still in their first year need more regular water through summer heat than mature, established plants do.

If the grayed-out, thinned summer look reads as neglected from the street, a light shaping prune that removes the driest stems keeps the bed looking intentional rather than weedy.