Tree Guide / Southern California

Olive Tree

A patient, sculptural tree that rewards thoughtful care with silver leaves, deep roots, and a character all its own.

01 / Best Time to Prune

Prune while the tree is waking.

Late winter to early spring is the best window for olive pruning in Southern California, just before new growth begins. The tree can seal cuts as it enters its growing season. Avoid heavy summer pruning, which can expose branches to intense heat and sunburn.

02 / Pruning

Make room for air, not perfection.

Prune for structure and airflow rather than size. Remove dead, damaged, or crossing branches, along with vigorous shoots growing from the trunk or base. Keep the olive’s natural, open form — over-shearing creates dense growth and weakens its character.

03 / Watering

Deeply, then let it rest.

Water deeply and infrequently, soaking the root zone rather than sprinkling the surface. Established olives are drought-tolerant, but they still need a thorough drink during prolonged dry spells. Let the soil dry between waterings; consistently wet roots invite trouble.

04 / Fertilizing

A little support in spring.

Mature olive trees usually need very little fertilizer. If growth is weak or leaves are pale, apply a balanced, slow-release fertilizer in early spring and water it in well. Avoid feeding during hot summer weather or pushing lush growth with too much nitrogen.

05 / Common Stressors

Olive Knot

Rough swellings on twigs and branches caused by a bacterial infection. Prune affected wood in dry weather and sanitize tools between cuts.

Scale & Sooty Mold

Sticky leaves and a black coating often point to scale insects. Improve airflow and address the pest at the source.

Overwatering

Yellow leaves and slow growth can mean roots are staying wet. Check drainage before reaching for fertilizer.

Poor Drainage

Olives prefer soil that drains freely. Standing water around the base can damage roots quickly.

Heat Stress

Newly exposed bark and leaves may scorch after hard pruning in summer. Shade and steady, calm care help recovery.