Trichocereus Grandiflorus

Trichocereus grandiflorus

Light

Water

Low water once established. Water deeply, then let the soil dry completely before watering again. Water sparingly in winter; avoid keeping roots wet during extreme summer heat.

Size

2-4 ft tall × 2-3 ft wide

Habit

Columnar cactus – clustering

Toxicity

Not Established

Description

A clumping Argentine cactus with ribbed, spiny green stems and exceptionally large, showy flowers; commonly sold as torch cactus, often in hybrid forms.

Bloom Time

Spring to early summer

Deciduous / Evergreen

Evergreen

Special Features

Drought Tolerant

Growth Rate

Slow to moderate

Growth Habit

Columnar cactus – clustering

Mature Size

2-4 ft tall × 2-3 ft wide

Flower Color

Red to orange-red

Foliage Color

Green

Landscape Use

Border / Bed, Cactus / Succulent Garden, Container / Patio, Desert / Xeriscape

Garden Style

Container / Patio, Desert / Xeriscape

Soil

Amended / Rich, Sandy / Rocky, Well-Drained

Companion Plants

Golden barrel cactus, Red yucca, Santa Rita prickly pear

Not Established

Not established — verify

Care Instructions

Light: Full morning sun with afternoon shade in Phoenix; protect from intense western sun, especially during summer. Acclimate gradually to stronger light.

Water: Low water once established. Water deeply, then let the soil dry completely before watering again. Water sparingly in winter; avoid keeping roots wet during extreme summer heat.

Soil: Very well-drained, gritty or gravelly soil. Use a mineral-rich cactus mix in containers and avoid low spots where water collects.

Mature size: Typically 1–2 feet tall and 2–3 feet wide as a clump; some hybrids grow taller.

Bloom: Typically blooms in spring through early summer; established plants may produce additional flushes. Individual flowers usually last about one day.

Evergreen / deciduous: Evergreen succulent.

Growth rate: Moderate during warm weather with appropriate watering; slower under very dry conditions.