# Saguaro Cactus (Carnegiea gigantea)

> The iconic symbol of the Sonoran Desert, Carnegiea gigantea is a monumental columnar cactus famed for its massive ribbed trunk and branching arms that develop over decades. Capable of reaching 12 to 15 meters in habitat, this remarkably slow-growing species bears nocturnal white blossoms and deep vertical ridges tailored for water storage. In container cultivation, it provides an architectural focal point requiring abundant sunlight and patient care.

- **Scientific Name:** *Carnegiea gigantea*
- **Botanical Family:** Cactaceae
- **Care Difficulty:** Moderate (2/5)
- **Cold Hardiness:** -4°C (USDA Zone 9b); tolerates brief, light frost only when substrate is completely bone-dry; prolonged freezing must be avoided.
- **Pet Safety / Toxicity:** Pet-Safe (Non-toxic to cats and dogs)
- **Canonical URL:** https://sukulentler.com/en/species/carnegiea-gigantea
- **Markdown Source:** https://sukulentler.com/en/species/carnegiea-gigantea.md
- **Botanical Photo:** https://sukulentler.com/assets/images/articles/species_carnegiea_gigantea.webp?v=1794042105

## Light & Sun Exposure

Full sun; requires a minimum of 6-8 hours of direct, unfiltered sunlight daily. Inadequate light leads to irreversible etiolation and weakens the plant.

## Watering Schedule & Method

Strict soak-and-dry protocol. Water thoroughly during the spring and summer active growth cycle only after the substrate has completely dried; suspend watering completely in winter.

## Soil & Gritty Mix Formula

%70 coarse inorganic grit (%35 Pumice + %35 Lava Rock / Quartz Sand) + %30 Cactus Compost.

## Cold Tolerance & Overwintering

-4°C (USDA Zone 9b); tolerates brief, light frost only when substrate is completely bone-dry; prolonged freezing must be avoided.

## Propagation Methods

Propagated almost exclusively by seeds (sown in spring at 21-27°C / 70-80°F on a gritty, sterile surface); vegetative stem cuttings are extremely rare and difficult.

## Available Language Editions

- [TR: Dev Saguaro Kaktüsü (Carnegiea gigantea)](https://sukulentler.com/tr/turler/carnegiea-gigantea.md)
- [DE: Saguaro-Kaktus (Carnegiea gigantea)](https://sukulentler.com/de/arten/carnegiea-gigantea.md)
- [ES: Sahuaro (Carnegiea gigantea)](https://sukulentler.com/es/especies/carnegiea-gigantea.md)