Native & adapted

Southern live oak

Quercus virginiana

A massive, long-lived evergreen shade tree for large, deeply irrigated properties—not a desert xeriscape tree or a small-yard substitute.

Arid adaptedEvergreenWildlife habitatLarge shade tree

Landscape layersUpper canopy

Mature size

40–60 ft tall × 50–80 ft wide

Climate fit

Urban core · USDA 9b–10a · Valley suburbs · USDA 9a–9b · Desert outskirts · USDA 8b–9b

Special categories

ARID ADAPTED

Hardiness guidance

USDA zones 7b–10; heat tolerant with sufficient deep irrigation

Before you plant

These conditions determine whether it will thrive.

Cold hardiness

Hardy here

Hardy to roughly 5 to 10°F, far colder than Phoenix gets. Never needs protection.

Heat tolerance

Takes full sun and heat

Takes full sun and heat, west side included, as long as it gets regular deep water.

Sources:

edis.ifas.ufl.edu , everde.com

Right plant, right place

Will Southern live oak grow at your Arizona property?

Allow at least 20 ft from structures and far more canopy clearance where possible. This tree belongs in parks, estates, and large community landscapes with long-term irrigation capacity.

Best regional fit: Urban core · USDA 9b–10a, Valley suburbs · USDA 9a–9b, Desert outskirts · USDA 8b–9b.

Light

Sun exposure

Full sun with unrestricted canopy space.

Water

Irrigation

Moderate. Establish a very broad, deep irrigated root zone and plan for permanent water demand in the desert.

Choose the actual plant, not only the label

Cultivars & selections

Final canopy scale matters more than small differences among named selections. Favor proven nursery stock with one sound leader and branch architecture suited to long-term shade-tree training.

Seed-grown southern live oak

Quercus virginiana

Mature size40–60 ft tall × 50–80 ft wide

Best forMaximum evergreen shade on large properties

Seedlings vary in form and leaf shape. Choose for strong central structure and only where the full mature spread can be accommodated.

Cathedral

Quercus virginiana ‘Cathedral’

Mature size40–50 ft tall × 30–40 ft wide

Best forA more upright live-oak form

Selected for a comparatively upright, uniform canopy, but it remains a large tree requiring substantial root and crown space.

Planting & stewardship

How to help Southern live oak thrive

1
Reserve the complete mature canopy and root footprint before planting.
2
Deep-water a widening root zone; do not depend on a few emitters at the trunk.
3
Develop durable scaffold spacing with an experienced arborist while the tree is young.
4
Keep turf, trenching, and grade changes away from the structural root zone.

Read the horticultural reference ↗