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Saguaro

Carnegiea gigantea

Also listed as Cereus giganteus, Pilocereus giganteus

Also known as Sahuaro, Giant Cactus

tree☀️ full sun💧 low water❄ Hardy: Zone 8b – Zone 11b

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An iconic columnar cactus native to the Sonoran Desert with a thick trunk and upright arms, producing fragrant white flowers in late spring. Extremely slow-growing and long-lived, requiring full sun and minimal water once established.

Why grow it

Saguaros are among the longest-lived cacti in cultivation, with specimens potentially exceeding 150 years, offering a permanent landscape feature in suitable climates. Compared to faster-growing columnar cacti, they provide unmatched architectural presence and are the only native cactus that reliably produces large white flowers and red fruit attractive to desert wildlife. Their minimal water and nutrient requirements once established make them a low-maintenance choice for xeriscape gardens in the Sonoran Desert region and similar hot, arid zones.

Watch out for

Growth is extremely slow (often less than 1.5 inches per year), so expect decades before the plant reaches significant size or flowering maturity. Young plants benefit from protection from intense afternoon sun and occasional deep watering during establishment, contrary to their eventual drought tolerance. In cultivation outside their native range, winter temperatures below freezing or extended cool periods can stress or kill plants, even mature ones.

Overview

Form
Upright
Growth Rate
slow
Size
40–9′ tall × 15–25′ wide
Dormancy
evergreen
Family
Cactaceae
Edible

Native to the United States

Native Range

Sonoran Desert (Arizona, Mexico)

Native to: Arizona, California

Seasonality

Bloom Season

J
F
M
A
M
J
J
A
S
O
N
D

Harvest Season

J
F
M
A
M
J
J
A
S
O
N
D

Edible Parts

fruit

Season of Interest

SpringSummer

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Companion Planting

Plants well with