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Saguaro

Carnegiea gigantea

Saguaro Cactus
Cactus & Succulents

The towering symbol of the Sonoran Desert, and its white blossom is Arizona’s state flower. Saguaros grow very slowly and can live for well over a century, so a mature specimen gives a landscape instant, unmistakable Arizona character.

Large
Full sunpreferred
Ask a designer about it
Mature size40–50′ tall over many decades, with arms
Growth rateVery slow; arms often take decades to appear
Water useVery low once established
SunFull sun
BloomWhite, May into June; opens at night, stays open into the next day
Cold hardinessMature plants to about 14°F; young plants and tips are tender
FoliagePleated green column with stiff spines along every rib
Lifespan150–200 years

Living with it in the Phoenix Valley

Watering

Follow the cactus guidance in our Landscape Care guide, which means watering by hand only when the plant needs it. A newly planted saguaro needs careful attention while its roots re-establish. After that it lives largely on rainfall. Soggy soil is far more dangerous than drought.

Pruning

None. Never cut the column or arms.

Planting

Transplanted saguaros do best when set in the same orientation they grew in, so the side that faced south keeps facing south. This avoids sunburn on skin that grew in shade.

Cold

Hard freezes can damage the growing tip, where the plant stores much of its water. Cover the top of young or newly planted saguaros on the coldest nights.

How our designers use it

A signature specimen

One well-placed saguaro can define a whole landscape. Our designers often position it where it will be lit at night and seen from inside the home.

Natural groupings

Several saguaros of different heights, set among palo verdes, ironwoods and native shrubs, recreate the look of the open desert.

Under a nurse tree

Young saguaros grow naturally beneath palo verdes and ironwoods, and a light canopy shelters small plants from the harshest sun.

Good to know

Around the pool

The spines are stiff and sharp, and a mature saguaro is extremely heavy. We keep it clear of pool decks and walkways, and well away from where it could ever lean toward the water.

Permits

Saguaros are protected under Arizona’s native plant law. Buy only properly tagged plants, and moving one requires the right permits.

Pairs well with

Similar plants

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Picturing one in your yard?

Our designers can show you where it will thrive, what to plant beneath it and how it fits the rest of your landscape.

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